diff --git a/src/kiri/conf.js b/src/kiri/conf.js
index 4346a5e8..8fc1352e 100644
--- a/src/kiri/conf.js
+++ b/src/kiri/conf.js
@@ -716,6 +716,8 @@
             synth: {},
             // widget extra info for slicing (extruder mapping)
             widget: {},
+            // other stored info like palette3 config
+            extras: {},
             mode: 'FDM',
             id: genID(),
             ver: CVER
diff --git a/src/kiri/init.js b/src/kiri/init.js
index 5b926bd6..c25825da 100644
--- a/src/kiri/init.js
+++ b/src/kiri/init.js
@@ -109,12 +109,33 @@
         }
     }
 
+    function filamentSourceEditUpdate() {
+        if (UI.filamentSource && UI.filamentSourceEdit) {
+            const sel = UI.filamentSource.options[UI.filamentSource.selectedIndex];
+            if (sel) {
+                UI.filamentSourceEdit.style.display = sel.value === 'palette3' ? '' : 'none';
+            }
+        }
+    }
+
     function filamentSourceSave() {
         const sel = UI.filamentSource.options[UI.filamentSource.selectedIndex];
         if (sel) {
             settings().device.filamentSource = sel.value;
             API.conf.save();
         }
+        filamentSourceEditUpdate();
+    }
+
+    function palette3Config() {
+        let conf = API.conf.get().extras;
+        if (!conf.palette) {
+            conf.palette = { printer: "uuid" };
+        }
+        let uuid = prompt('Printer UID from Canvas', conf.palette.printer);
+        if (uuid) {
+            conf.palette.printer = uuid;
+        }
     }
 
     function detailSave() {
@@ -868,6 +889,7 @@
             }
 
             UC.refresh();
+            filamentSourceEditUpdate();
 
             if (dev.imageURL) {
                 if (dev.imageURL !== deviceURL) {
@@ -1642,6 +1664,7 @@
             extOffsetY:       UC.newInput(LANG.dv_exoy_s, {title:LANG.dv_exoy_l, convert:UC.toFloat, modes:FDM}),
             extSelect:        UC.newText(LANG.dv_exts_s, {title:LANG.dv_exts_l, modes:FDM, size:14, height:3, modes:FDM, area:gcode}),
             extDeselect:      UC.newText(LANG.dv_dext_s, {title:LANG.dv_dext_l, modes:FDM, size:14, height:3, modes:FDM, area:gcode}),
+            extPad:           UC.newBlank({class:"grow", modes:FDM}),
             extActions:       UC.newRow([
                 UI.extPrev = UC.newButton(undefined, undefined, {icon:'<i class="fas fa-less-than"></i>'}),
                 UI.extAdd = UC.newButton(undefined, undefined, {icon:'<i class="fas fa-plus"></i>'}),
@@ -2764,6 +2787,16 @@
             API.show.alert("this is a beta / development release");
             SDB.kiri_beta = KIRI.beta;
         }
+
+        // add palette3 edit button after filament source selector
+        {
+            let fsp = UI.filamentSource.parentNode;
+            let btn = UI.filamentSourceEdit = DOC.createElement('button');
+            btn.setAttribute('id', 'fs-edit');
+            btn.appendChild(DOC.createTextNode('edit'));
+            fsp.insertBefore(btn, UI.filamentSource);
+            btn.onclick = palette3Config;
+        }
     }
 
     // update static html elements with language overrides
diff --git a/src/kiri/worker.js b/src/kiri/worker.js
index 7b9617ee..9f0a7981 100644
--- a/src/kiri/worker.js
+++ b/src/kiri/worker.js
@@ -446,11 +446,11 @@ KIRI.worker = {
         }, function(debug) {
             send.data({debug});
         });
-        const { bounds, time, lines, bytes, distance, settings } = current.print;
+        const { bounds, time, lines, bytes, distance, settings, segments } = current.print;
 
         send.done({
             done: true,
-            output: output ? output : { bounds, time, lines, bytes, distance, settings }
+            output: output ? output : { bounds, time, lines, bytes, distance, settings, segments }
         });
     },
 
diff --git a/src/mode/fdm/export.js b/src/mode/fdm/export.js
index 0376a028..c5247c06 100644
--- a/src/mode/fdm/export.js
+++ b/src/mode/fdm/export.js
@@ -120,7 +120,8 @@
             inloops = 0,
             arcQ = [],
             minz = { x: Infinity, y: Infinity, z: Infinity },
-            isPalette = device.filamentSource === 'palette3';
+            isPalette = device.filamentSource === 'palette3',
+            segments = [];
 
         // smallish band-aid. refactor above to remove redundancy
         function updateParams(layer) {
@@ -485,6 +486,7 @@
 
                 // look for extruder change, run scripts, recalc emit factor
                 if (out.tool !== undefined && out.tool != tool) {
+                    segments.push({emitted, tool});
                     appendAllSub(extruder.extDeselect);
                     tool = out.tool;
                     subst.nozzle = subst.tool = tool;
@@ -496,7 +498,10 @@
                         extruder.extFilament,
                         path.layer === 0 ?
                             (process.firstSliceHeight || process.sliceHeight) : path.height);
-                    appendAllSub(extruder.extSelect);
+                    // do not run extruder swapping code when source is Palette3
+                    if (!isPalette) {
+                        appendAllSub(extruder.extSelect);
+                    }
                 }
 
                 // if no point in output, it's a dwell command
@@ -804,6 +809,7 @@
             append(`M808`);
         }
 
+        segments.push({emitted, tool});
         subst.material = UTIL.round(emitted,2);
         subst.time = UTIL.round(time,2);
         subst['print_time'] = subst.time;
@@ -816,12 +822,14 @@
         // force emit of buffer
         append();
 
+        print.segments = segments;
         print.distance = emitted;
         print.lines = lines;
         print.bytes = bytes + lines - 1;
         print.time = time;
 
         if (debug) {
+            console.log('segments', segments);
             console.log('minz', minz);
         }
     };
diff --git a/src/mode/fdm/prepare.js b/src/mode/fdm/prepare.js
index c3063362..209b5310 100644
--- a/src/mode/fdm/prepare.js
+++ b/src/mode/fdm/prepare.js
@@ -242,6 +242,7 @@
             }
         }
 
+        // determine size/location of purge blocks
         let blokpos, walkpos, blok;
         if (bounds.min.x < bounds.min.y) {
             let dx = ((bounds.max.x - bounds.min.x) - (extcount * 10)) / 2 + 5;
@@ -255,7 +256,7 @@
             blok = { x:4, y:9 };
         }
 
-        // compute purge blocks
+        // replace extruders array with object array containing more info
         extruders = extruders.map((ext,i) => {
             if (!ext) return ext;
             let noz = device.extruders[i].extNozzle,
diff --git a/web/kiri/index.css b/web/kiri/index.css
index 0d75a95b..2035015e 100644
--- a/web/kiri/index.css
+++ b/web/kiri/index.css
@@ -1739,6 +1739,11 @@ th, tr, td, label {
     font-family: monospace;
 }
 
+#fs-edit {
+    text-transform: none;
+    padding: 1px 3px 1px 3px;
+    margin: 0 3px 0 0 !important;
+}
 #gdpr {
     position: absolute;
     display: none;