diff --git a/notes.md b/notes.md
index fc5a2046..12f11c0e 100644
--- a/notes.md
+++ b/notes.md
@@ -3,7 +3,6 @@
 ## 2.3 remaining
 * adaptive shadow-line generation for small parts collision detection
 * test path clearance for every move > % of tool diam and ...
-* contour tabs support
 * path arrows, retracts, and engages
 * cap path ends
 * help dialog
diff --git a/src/kiri/init.js b/src/kiri/init.js
index 8224f20b..833c79ef 100644
--- a/src/kiri/init.js
+++ b/src/kiri/init.js
@@ -1507,7 +1507,7 @@
             camDrillingOn:       UC.newBoolean(LANG.enable, onBooleanClick, {modes:CAM}),
             camDrillSep:         UC.newBlank({class:"pop-sep"}),
             camDrillReg:         UC.newSelect(LANG.cd_regi_s, {modes:CAM, title:LANG.cd_regi_l}, "drillreg"),
-            camTabs:             UC.newGroup(LANG.ct_menu, null, {modes:CAM, marker:true, show:() => { return UI.camOutlineOn.checked || UI.camRoughOn.checked }}),
+            camTabs:             UC.newGroup(LANG.ct_menu, null, {modes:CAM, marker:true}),
             camTabsAngle:        UC.newInput(LANG.ct_angl_s, {title:LANG.ct_angl_l, convert:UC.toInt, bound:UC.bound(0,360), modes:CAM}),
             camTabsCount:        UC.newInput(LANG.ct_numb_s, {title:LANG.ct_numb_l, convert:UC.toInt, bound:UC.bound(1,20), modes:CAM}),
             camTabsWidth:        UC.newInput(LANG.ct_wdth_s, {title:LANG.ct_wdth_l, convert:UC.toFloat, bound:UC.bound(0.1,100), modes:CAM, units:true}),
diff --git a/src/mode/cam/slice.js b/src/mode/cam/slice.js
index 73b91768..7be3047a 100644
--- a/src/mode/cam/slice.js
+++ b/src/mode/cam/slice.js
@@ -469,43 +469,30 @@
     }
 
     // cut outside traces at the right points
-    function addCutoutTabs(offset, z, toolDiam, tabWidth, tabCount, tabAngle) {
+    function addCutoutTabs(polys, z, toolDiam, tabWidth, tabCount, tabAngle) {
         // skip if no tops | traces
-        if (offset.length === 0) return offset;
+        if (polys.length === 0) return polys;
 
         let notabs = 0;
         let nutrace = [];
 
-        // find trace with greatest area
-        offset.forEach(function(trace, index) {
-
+        polys.forEach(function(trace, index) {
             // required to match computed order of cutouts
             trace.setClockwise();
 
-            let count = tabCount,
-                angle = tabAngle,
-                angle_inc = 360 / count,
-                center = trace.bounds.center(z),
-                offset = (tabWidth + toolDiam) / 2,
-                ints = [],
-                segs = [];
-
-            while (count-- > 0) {
-                let slope = BASE.newSlopeFromAngle(angle),
-                    normal = BASE.newSlopeFromAngle(angle + 90),
-                    c1 = center.projectOnSlope(normal, offset),
-                    c2 = center.projectOnSlope(normal, -offset),
-                    o1 = c1.projectOnSlope(slope, 10000),
-                    o2 = c2.projectOnSlope(slope, 10000),
+            let ints = [];
+            let center = trace.bounds.center(z);
+            CAM.createTabLines(center, toolDiam, tabWidth, tabCount, tabAngle).forEach(tab => {
+                const {c1, c2, o1, o2} = tab,
                     int1 = trace.intersections(c1, o1).pop(),
                     int2 = trace.intersections(c2, o2).pop();
                 if (int1 && int2) {
                     ints.push(int1);
                     ints.push(int2);
                 }
-                angle -= angle_inc;
-            }
+            });
 
+            let segs = [];
             if (ints.length) {
                 ints.push(ints.shift());
                 for (let i=0; i<ints.length; i+=2) {
@@ -529,7 +516,6 @@
                 nutrace.push(trace);
                 notabs++;
             }
-
         });
 
         if (notabs) {
@@ -539,4 +525,23 @@
         return nutrace;
     }
 
+    CAM.createTabLines = function(center, toolDiam, tabWidth, tabCount, tabAngle) {
+        let angle_inc = 360 / tabCount,
+            offset = (tabWidth + toolDiam) / 2,
+            lines = [];
+
+        while (tabCount-- > 0) {
+            let slope = BASE.newSlopeFromAngle(tabAngle),
+                normal = BASE.newSlopeFromAngle(tabAngle + 90),
+                c1 = center.projectOnSlope(normal, offset),
+                c2 = center.projectOnSlope(normal, -offset),
+                o1 = c1.projectOnSlope(slope, 10000),
+                o2 = c2.projectOnSlope(slope, 10000);
+            tabAngle -= angle_inc;
+            lines.push({c1, o1, c2, o2});
+        }
+
+        return lines;
+    }
+
 })();
diff --git a/src/mode/cam/topo.js b/src/mode/cam/topo.js
index 2528e458..ce7e7856 100644
--- a/src/mode/cam/topo.js
+++ b/src/mode/cam/topo.js
@@ -56,12 +56,30 @@
                     widget: widget
                 },
                 newslices = [],
+                tabsOn = proc.camTabsOn,
+                tabHeight = proc.camTabsHeight,
+                clipTab = tabsOn ? [] : null,
                 clipTo = inside ? shadow : POLY.expand(shadow, toolDiameter + resolution),
                 partOff = inside ? 0 : toolDiameter / 2 + resolution,
                 gridDelta = Math.floor(partOff / resolution);
 
-            let newlines,
-                newtop,
+            if (proc.camTabsOn) {
+                CAM.createTabLines(
+                    clipTo[0].bounds.center(),
+                    toolDiameter,
+                    proc.camTabsWidth,
+                    proc.camTabsCount,
+                    proc.camTabsAngle
+                ).forEach(tab => {
+                    const { o1, o2, c1, c2 } = tab;
+                    const poly = newPolygon().addPoints([
+                        o1, c1, c2, o2
+                    ]);
+                    clipTab.push(poly);
+                });
+            }
+
+            let newtop,
                 newtrace,
                 sliceout,
                 latent,
@@ -174,16 +192,16 @@
                 }
 
                 const checkr = newPoint(0,0);
-                const inClip = clipTo ? function() {
+                const inClip = function(polys) {
                     checkr.x = x;
                     checkr.y = y;
-                    for (let i=0; i<clipTo.length; i++) {
-                        if (checkr.isInPolygon(clipTo[i])) {
+                    for (let i=0; i<polys.length; i++) {
+                        if (checkr.isInPolygon(polys[i])) {
                             return true;
                         }
                     }
                     return false;
-                } : function() { return true };
+                };
 
                 // x contouring
                 if (proc.camContourXOn) {
@@ -194,13 +212,15 @@
                         ly = gridy = -gridDelta;
                         slice = newSlice(gridx);
                         slice.camMode = PRO.CONTOUR_X;
-                        // slice.lines = newlines = [];
                         newtop = slice.addTop(newPolygon().setOpen()).poly;
                         newtrace = newPolygon().setOpen();
                         sliceout = [];
                         for (y = minY - partOff; y < maxY + partOff; y += resolution) {
                             tv = toolTipZ(gridx, gridy);
-                            if (tv === 0 && clipTo && !inClip()) {
+                            if (tabsOn && tv < tabHeight && inClip(clipTab)) {
+                                tv = tabHeight;
+                            }
+                            if (tv === 0 && clipTo && !inClip(clipTo)) {
                                 end_poly();
                                 gridy++;
                                 ly = -gridDelta;
@@ -245,13 +265,15 @@
                         lx = gridx = -gridDelta;
                         slice = newSlice(gridy);
                         slice.camMode = PRO.CONTOUR_Y;
-                        // slice.lines = newlines = [];
                         newtop = slice.addTop(newPolygon().setOpen()).poly;
                         newtrace = newPolygon().setOpen();
                         sliceout = [];
                         for (x = minX - partOff; x <= maxX + partOff; x += resolution) {
                             tv = toolTipZ(gridx, gridy);
-                            if (tv === 0 && clipTo && !inClip()) {
+                            if (tabsOn && tv < tabHeight && inClip(clipTab)) {
+                                tv = tabHeight;
+                            }
+                            if (tv === 0 && clipTo && !inClip(clipTo)) {
                                 end_poly();
                                 gridx++;
                                 lx = -gridDelta;