diff --git a/package.json b/package.json
index cf82ddf8..19e037ec 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "grid-apps",
-    "version": "3.0.28D",
+    "version": "3.0.29D",
     "description": "grid.space 3d slice & modeling tools",
     "author": "Stewart Allen <sa@grid.space>",
     "license": "MIT",
diff --git a/src/kiri.js b/src/kiri.js
index 187df01d..32dd7354 100644
--- a/src/kiri.js
+++ b/src/kiri.js
@@ -6,7 +6,7 @@
 
     if (!self.kiri) {
         self.kiri = {
-            beta: 3028,
+            beta: 3029,
             driver: {}, // driver modules
             loader: []  // module loading: array of functions
         };
diff --git a/src/license.js b/src/license.js
index 7236bc37..26a2baff 100644
--- a/src/license.js
+++ b/src/license.js
@@ -3,7 +3,7 @@
     let terms = {
         COPYRIGHT: "Copyright (C) Stewart Allen <sa@grid.space> - All Rights Reserved",
         LICENSE: "See the license.md file included with the source distribution",
-        VERSION: "3.0.D28"
+        VERSION: "3.0.D29"
     };
 
     if (typeof(module) === 'object') {
diff --git a/src/mode/cam/export.js b/src/mode/cam/export.js
index 21d09a1b..56e6f0c5 100644
--- a/src/mode/cam/export.js
+++ b/src/mode/cam/export.js
@@ -242,7 +242,7 @@
             append(`; Target: ${settings.filter[settings.mode]}`);
             append("; --- process ---");
             for (let pk in spro) {
-                if (pk !== "ops") {
+                if (pk !== "ops" && pk !== "op2") {
                     append("; " + pk + " = " + spro[pk]);
                 }
             }
diff --git a/src/mode/fdm/export.js b/src/mode/fdm/export.js
index 6a1ac588..94066474 100644
--- a/src/mode/fdm/export.js
+++ b/src/mode/fdm/export.js
@@ -108,7 +108,7 @@
             bytes = 0,
             bcos = Math.cos(Math.PI/4),
             icos = 1 / bcos,
-            inLoop,
+            inloops = 0,
             arcQ = [],
             minz = { x: Infinity, y: Infinity, z: Infinity };
 
@@ -142,27 +142,29 @@
             });
         }
 
-        // collect loops from ranges and synth range array
         let rloops = [];
         if (loops > 0) {
+            // if loops set, loop entire part
             rloops.push({
                 start: layers[0].slice.index,
                 end: layers.last().slice.index,
                 iter: loops - 1
             });
         }
-        if (process.ranges)
-        for (let range of process.ranges) {
-            if (range.fields.outputLoops) {
-                rloops.push({
-                    start: range.lo,
-                    end: range.hi,
-                    iter: range.fields.outputLoops - 1
-                });
+        if (process.ranges) {
+            // collect loops from ranges and synth range array
+            for (let range of process.ranges) {
+                if (range.fields.outputLoops) {
+                    rloops.push({
+                        start: range.lo,
+                        end: range.hi,
+                        iter: range.fields.outputLoops - 1
+                    });
+                }
             }
         }
         loops = isBelt && rloops.length ? rloops : undefined;
-
+console.log({loops});
         (process.gcodePauseLayers || "").split(",").forEach(function(lv) {
             let v = parseInt(lv);
             if (v >= 0) pause.push(v);
@@ -200,6 +202,13 @@
             arr.forEach(function(line) { appendSub(line, pad) });
         }
 
+        function appendTok() {
+            let arg = [...arguments].map(v => {
+                return typeof(v) === 'object' ? JSON.stringify(v) : v;
+            });
+            append(arg.join(''));
+        }
+
         append(`; Generated by Kiri:Moto ${KIRI.version}`);
         append(`; ${new Date().toString()}`);
         appendSub("; Bed left:{left} right:{right} top:{top} bottom:{bottom}");
@@ -217,7 +226,8 @@
         }
         append("; --- process ---");
         for (let pk in process) {
-            append("; " + pk + " = " + process[pk]);
+            // append("; " + pk + " = " + process[pk]);
+            appendTok("; ", pk, " = ", process[pk]);
         }
         append("; --- startup ---");
         let t0 = false;
@@ -397,26 +407,23 @@
                 appendAllSub(pauseCmd)
             }
 
-            let endloop = false;
+            let endloop = 0;
             if (loops) {
-                if (inLoop) {
-                    if (layerno === inLoop.end) {
-                        endloop = true;
-                        // append(`M808`);
-                        // inLoop = undefined;
-                    }
-                } else {
-                    for (let loop of loops) {
-                        if (layerno === loop.start) {
-                            append(`M808 L${loop.iter}`);
-                            if (extrudeAbs) {
-                                append(`G92 Z${lout.z.round(decimals)} E${outputLength.round(decimals)}`);
-                            } else {
-                                append(`G92 Z${lout.z.round(decimals)}`);
-                            }
-                            inLoop = loop;
-                            break;
+                for (let loop of loops) {
+                    if (layerno === loop.start && !loop.started) {
+                        loop.started = true;
+                        append(`M808 L${loop.iter}`);
+                        if (extrudeAbs) {
+                            append(`G92 Z${lout.z.round(decimals)} E${outputLength.round(decimals)}`);
+                        } else {
+                            append(`G92 Z${lout.z.round(decimals)}`);
                         }
+                        inloops++;
+                    }
+                    if (layerno === loop.end && !loop.ended) {
+                        loop.ended = true;
+                        endloop++;
+                        inloops--;
                     }
                 }
             }
@@ -649,9 +656,8 @@
             layer++;
 
             // end open loop when detected
-            if (endloop) {
+            while (endloop-- > 0) {
                 append(`M808`);
-                inLoop = undefined;
             }
             drainQ();
         }
@@ -784,7 +790,7 @@
 
         }
 
-        if (inLoop) {
+        if (inloops) {
             append(`M808`);
         }