diff --git a/src/kiri-mode/cam/client.js b/src/kiri-mode/cam/client.js
index 55e451ff..03e0d779 100644
--- a/src/kiri-mode/cam/client.js
+++ b/src/kiri-mode/cam/client.js
@@ -1287,7 +1287,8 @@ CAM.init = function(kiri, api) {
         step:    'camLevelOver',
         rate:    'camLevelSpeed',
         down:    'camLevelDown',
-        over:    'camLevelOver'
+        over:    'camLevelOver',
+        stock:   'camLevelStock'
     }).inputs = {
         tool:    UC.newSelect(LANG.cc_tool, {}, "tools"),
         sep:     UC.newBlank({class:"pop-sep"}),
@@ -1296,6 +1297,8 @@ CAM.init = function(kiri, api) {
         rate:    UC.newInput(LANG.cc_feed_s, {title:LANG.cc_feed_l, convert:UC.toInt, units:true}),
         down:    UC.newInput(LANG.cc_loff_s, {title:LANG.cc_loff_l, convert:UC.toFloat, units:true}),
         over:    UC.newInput(LANG.cc_lxyo_s, {title:LANG.cc_lxyo_l, convert:UC.toFloat, units:true}),
+        sep:     UC.newBlank({class:"pop-sep"}),
+        stock:   UC.newBoolean(LANG.cc_lsto_s, undefined, {title:LANG.cc_lsto_l}),
     };
 
     createPopOp('rough', {
diff --git a/src/kiri-mode/cam/ops.js b/src/kiri-mode/cam/ops.js
index 13a30e45..52150e30 100644
--- a/src/kiri-mode/cam/ops.js
+++ b/src/kiri-mode/cam/ops.js
@@ -124,9 +124,10 @@ class OpLevel extends CamOp {
         updateToolDiams(toolDiam);
 
         let points = [];
-        let clear = POLY.outer(POLY.offset(tshadow, toolDiam * (op.over || 0)));
-        // let tabsub = [];
-        // POLY.subtract(clear, POLY.offset(tabs.map(t => t.poly), toolDiam/2), tabsub, []);
+        let clear = op.stock ?
+            [ newPolygon().centerRectangle({x:0,y:0,z:0}, stock.x, stock.y) ] :
+            POLY.outer(POLY.offset(tshadow, toolDiam * (op.over || 0)));
+
         POLY.fillArea(clear, 90, stepOver, points);
 
         let lines = this.lines = [];
diff --git a/src/kiri/conf.js b/src/kiri/conf.js
index 6a07b754..06f05f1d 100644
--- a/src/kiri/conf.js
+++ b/src/kiri/conf.js
@@ -465,6 +465,7 @@ const conf = exports({
                 camLevelSpeed: 1000,
                 camLevelDown: 0,
                 camLevelOver: 0.5,
+                camLevelStock: true,
                 camRoughTool: 1000,
                 camRoughSpindle: 1000,
                 camRoughDown: 2,
diff --git a/web/kiri/lang/en.js b/web/kiri/lang/en.js
index f047eceb..bbca9546 100644
--- a/web/kiri/lang/en.js
+++ b/web/kiri/lang/en.js
@@ -493,6 +493,8 @@ self.kiri.lang['en-us'] = {
     cc_loff_l:      ["distance from stock face","in workspace units"],
     cc_lxyo_s:      "xy offset",
     cc_lxyo_l:      ["xy offset from part boundary as a fraction of the tool diameter (0 - 1.0)"],
+    cc_lsto_s:      "stock",
+    cc_lsto_l:      ["use stock area instead of part area"],
 
     // CNC ROUGHING
     cr_menu:        "rough",