diff --git a/mods/bambu/bambu.js b/mods/bambu/bambu.js
index 5d41e4b6..1a86038e 100644
--- a/mods/bambu/bambu.js
+++ b/mods/bambu/bambu.js
@@ -13,7 +13,7 @@ self.kiri.load(api => {
     let monitors = [];
     let video_on = false;
     let bound, device, printers, select, selected, conn_alert, export_select;
-    let btn_del, in_host, in_code, in_serial, filelist;
+    let btn_del, in_host, in_code, in_serial, filelist, print_ams_select = 'auto';
     let ptype, host, password, serial, amsmap, socket = {
         open: false,
         q: [],
@@ -243,6 +243,22 @@ self.kiri.load(api => {
                 h.option({ _: 'none', value: '255' }),
                 ...options
             ]);
+            [ "print-bambu-spool", "bbl_file_spool" ].forEach(dropdown => {
+                h.bind($(dropdown),[
+                    h.option({ _: 'external', value: '', _selected: print_ams_select === '' }),
+                    h.option({ _: 'ams auto', value: 'auto', _selected: print_ams_select === 'auto' }),
+                    ...trays.map(tray => {
+                        return h.option({
+                            _: `ams tray ${tray.id}`,
+                            _selected: print_ams_select === tray.id,
+                            value: tray.id,
+                        });
+                    })
+                ]);
+                $(dropdown).onchange = (ev) => {
+                    print_ams_select = ev.target.value;
+                };
+            });
             let tdiv = $('bbl_ams_trays');
             tdiv.setAttribute("style",[
                 "gap: 5px;",
@@ -263,6 +279,9 @@ self.kiri.load(api => {
             })))
         } else {
             $('bbl_ams_tray').innerHTML = '';
+            $('bbl_file_spool').innerHTML = '';
+            $('print-bambu-spool').innerHTML = '';
+            print_ams_select = 'auto';
         }
         let state = (gcode_state || 'unknown').toLowerCase();
         $('bbl_noz').value = nozzle_diameter || '';
@@ -431,9 +450,17 @@ self.kiri.load(api => {
 
     function file_print(path) {
         if (selected?.rec?.host && path) {
+            let spool = print_ams_select;
             let { host, code, serial } = selected.rec;
-            console.log({ file_print: path, host, code, serial, amsmap });
-            socket.send({ cmd: "file-print", path, host, code, serial, amsmap });
+            console.log({ file_print: path, host, code, serial, spool, amsmap });
+            socket.send({
+                cmd: "file-print",
+                path,
+                host,
+                code,
+                serial,
+                amsmap: spool === 'auto' && amsmap ? amsmap : spool
+            });
         }
     }
 
@@ -743,16 +770,11 @@ self.kiri.load(api => {
                             h.label('date'),
                             h.input({ id: "bbl_file_date", size: 12, readonly })
                         ]),
+                        h.div({ class: "var-row" }, [
+                            h.label('spool'),
+                            h.select({ id: "bbl_file_spool" })
+                        ]),
                         h.div({ class: "grow" }),
-                        h.button({
-                            _: 'delete',
-                            id: "bbl_file_delete",
-                            class: "f-col a-center t-center",
-                            disabled: true,
-                        onclick() {
-                            console.log({ deleting: selected.file.path });
-                            file_delete(selected.file.path);
-                        }}),
                         h.button({
                             _: 'print',
                             id: "bbl_file_print",
@@ -763,6 +785,15 @@ self.kiri.load(api => {
                             file_print(selected.file.path);
                             api.alerts.show(`printing: ${selected.file.path}`,2);
                         }}),
+                        h.button({
+                            _: 'delete',
+                            id: "bbl_file_delete",
+                            class: "f-col a-center t-center",
+                            disabled: true,
+                        onclick() {
+                            console.log({ deleting: selected.file.path });
+                            file_delete(selected.file.path);
+                        }}),
                     ]),
                     h.div({ class: "t-body t-inset f-col gap3 pad4" }, [
                         h.label({ class: "set-header dev-sel" }, [
@@ -796,8 +827,8 @@ self.kiri.load(api => {
         select.onchange = (ev => printer_select(select.value));
         filelist.onchange = (ev => {
             let file = selected.file = selected.status.files[filelist.selectedIndex];
-            $('bbl_file_size').value = file.size;
-            $('bbl_file_date').value = file.date;
+            $('bbl_file_size').value = file?.size ?? '';
+            $('bbl_file_date').value = file?.date ?? '';
             $('bbl_file_delete').disabled =
             $('bbl_file_print').disabled = false;
         });
@@ -876,29 +907,32 @@ self.kiri.load(api => {
             api.modal.show('bambu');
         }
         devlist.onchange = () => {
-            let info = printers[devlist.value];
+            let info = printers[devlist.value] || {};
             host = info.host;
             ptype = info.type;
             serial = info.serial;
             password = info.code;
             export_select = devlist.value;
+            $('print-bambu-spool').innerHMTL = '<option>loading...</option>';
             $('print-bambu-1').disabled =
             $('print-bambu-2').disabled =
                 (host && serial && password) ? false : true;
             get_ams_map(settings);
+            printer_select(export_select);
             console.log({ bambu: serial, ptype, host, amsmap });
         };
     }
 
     function send(filename, gcode, start) {
+        const spool = print_ams_select;
         const baseUrl = '/api/bambu_send';
         const url = new URL(baseUrl, window.location.origin);
         url.searchParams.append('host', host);
         url.searchParams.append('code', password);
         url.searchParams.append('filename', filename);
         url.searchParams.append('serial', serial);
-        url.searchParams.append('ams', amsmap);
         url.searchParams.append('start', start ?? false);
+        url.searchParams.append('ams', spool === 'auto' && amsmap ? amsmap : spool);
 
         const alert = api.alerts.show('Sending to Bambu Printer');
 
diff --git a/mods/bambu/frames.js b/mods/bambu/frames.js
index 08dd46c0..999dce0c 100644
--- a/mods/bambu/frames.js
+++ b/mods/bambu/frames.js
@@ -18,6 +18,7 @@ class FrameStream extends EventEmitter {
         const encoder = new TextEncoder();
         const userBytes = encoder.encode('bblp');
         const codeBytes = encoder.encode(code);
+        const useCA = false;
 
         view.setInt32(0, 0x0040, true);
         view.setInt32(4, 0x3000, true);
@@ -25,12 +26,16 @@ class FrameStream extends EventEmitter {
         new Uint8Array(abuf, 0x30, codeBytes.length).set(codeBytes);
 
         let frame;
-        const remoteSocket = this.#remoteSocket = tls.connect({
+        const remoteSocket = this.#remoteSocket = tls.connect(Object.assign({}, {
             host,
-            port: 6000,
+            port: 6000
+        }, useCA ? {
             ca: bblCA,
             servername: serial
-        }, () => {
+        } : {
+            rejectUnauthorized: false,
+            checkServerIdentity: () => {}
+        }), () => {
             // send authentication to start jpeg frame stream
             remoteSocket.write(Buffer.from(abuf));
             this.emit('connect', host);
diff --git a/mods/bambu/init.js b/mods/bambu/init.js
index ec2f5c1a..eeb80c6e 100644
--- a/mods/bambu/init.js
+++ b/mods/bambu/init.js
@@ -11,6 +11,7 @@ module.exports = async (server) => {
     const mcache = {};
     const wsopen = [];
     const found = {};
+    const useCA = false;
     const debug = false;
 
     class MQTT {
@@ -21,12 +22,15 @@ module.exports = async (server) => {
         #frames;
         #topic_report;
         #topic_request;
-        #options = {
+        #options = Object.assign({}, {
             protocol: 'mqtts',
             port: 8883,
             username: 'bblp',
+        }, useCA ? {
             ca: bblCA
-        }
+        } : {
+            rejectUnauthorized: false
+        });
 
         constructor(host, code, serial, onready, onerror, onmessage) {
             this.#options.host = host;
@@ -74,7 +78,10 @@ module.exports = async (server) => {
 
         keepalive() {
             clearTimeout(this.#timer);
-            this.#timer = setTimeout(() => { this.end() }, 30000);
+            this.#timer = setTimeout(() => {
+                util.log('keepalive expired', this.#serial);
+                this.end();
+            }, 300000);
         }
 
         keepconn() {
@@ -102,7 +109,7 @@ module.exports = async (server) => {
 
         end() {
             if (this.#client) {
-                debug && util.log('mqtt end', this.#serial);
+                util.log('mqtt end', this.#serial);
                 this.#client.end();
                 this.#client = undefined;
             }
@@ -144,7 +151,7 @@ module.exports = async (server) => {
         const host = args.host || "localhost";
         const user = args.user || "bblp";
         const password = args.password || args.code || '';
-        // client.ftp.verbose = true;
+        client.ftp.verbose = debug;
         try {
             await client.access({
                 port,
@@ -152,7 +159,12 @@ module.exports = async (server) => {
                 user,
                 password,
                 secure: "implicit",
-                secureOptions: { ca: bblCA, servername: args.serial }
+                secureOptions: useCA ? {
+                    ca: bblCA,
+                    servername: args.serial
+                } : {
+                    rejectUnauthorized: false
+                }
             });
         } catch (error) {
             util.log({ ftp_error: error });
@@ -219,10 +231,10 @@ module.exports = async (server) => {
                 vibration_cali: false
             }
         };
-        if (amsmap) {
+        if (amsmap && amsmap !== 'auto') {
             cmd.print.ams_mapping = amsmap.split(',').map(v => parseInt(v));
         }
-        debug && util.log({ file_print: cmd });
+        util.log({ file_print: cmd });
         get_mqtt(host, code, serial, message => {
             debug && util.log('mqtt_recv', message);
             wsend({ serial, message });
@@ -404,7 +416,7 @@ module.exports = async (server) => {
                     if_mqtt(serial, direct);
                     break;
                 case "frames":
-                    util.log('request frames', serial, frames);
+                    debug && util.log('request frames', serial, frames);
                     mcache[serial]?.set_frames(frames);
                     break;
                 case "keepalive":
diff --git a/src/kiri/export.js b/src/kiri/export.js
index 8e84594c..33ee8839 100644
--- a/src/kiri/export.js
+++ b/src/kiri/export.js
@@ -529,7 +529,7 @@ function exportGCodeDialog(gcode, sections, info, names) {
         }
 
         function gen3mf(then, ptype = 'unknown') {
-            console.log({ gen3mf_target: ptype });
+            console.log({ gen3mf_printer_type: ptype });
             let now = new Date();
             let ymd = [
                 now.getFullYear(),
@@ -583,6 +583,27 @@ function exportGCodeDialog(gcode, sections, info, names) {
                     '</Relationships>'
                 ].join('\n')
             },{
+            //     name: `Metadata/plate_1.json`,
+            //     data: JSON.toString({
+            //         "bbox_all": [ 115.199992, 115.199992, 140.799992, 140.799992 ],
+            //         "bbox_objects": [
+            //             {
+            //                 "area": 655.3599853515625,
+            //                 "bbox": [ 115.199992, 115.199992, 140.799992, 140.799992 ],
+            //                 "id": 42,
+            //                 "layer_height": 0.25,
+            //                 "name": "Cube"
+            //             }
+            //         ],
+            //         "bed_type": "textured_plate",
+            //         "filament_colors": ["#FFFFFF"],
+            //         "filament_ids": [0],
+            //         "first_extruder": 0,
+            //         "is_seq_print": false,
+            //         "nozzle_diameter": 0.6,
+            //         "version": 2
+            //     })
+            // },{
                 name: `Metadata/model_settings.config`,
                 data: [
                     '<?xml version="1.0" encoding="UTF-8"?>',
diff --git a/web/kiri/index.html b/web/kiri/index.html
index 60bf3ecf..8338bc18 100644
--- a/web/kiri/index.html
+++ b/web/kiri/index.html
@@ -633,8 +633,10 @@
             <div id="bambu-output" class="f-col">
                 <div class="header"><label>send to bambu</label></div>
                 <div class="f-row box gap4 a-center">
-                    <label class="grow0">printer</label>
+                    <label class="grow0 pad3">printer</label>
                     <select id="print-bambu-device"></select>
+                    <label class="grow0 pad3">spool</label>
+                    <select id="print-bambu-spool"></select>
                     <button id="print-bambu-1" class="grow" disabled>send</button>
                     <button id="print-bambu-2" class="grow" disabled>send + print</button>
                 </div>