diff --git a/js/kiri-driver-fdm.js b/js/kiri-driver-fdm.js
index 9486f403..18fdae50 100644
--- a/js/kiri-driver-fdm.js
+++ b/js/kiri-driver-fdm.js
@@ -181,19 +181,19 @@ var gs_kiri_fdm = exports;
                     // console.log({polish_update});
                 });
                 // compute y polishing slices
-                // SLICER.sliceWidget(widget, {
-                //     height: sdev.nozzleSize,
-                //     swapX: false,
-                //     swapY: true,
-                //     simple: true
-                // }, (polish_done => {
-                //     widget.polish.y = polish_done
-                //         .filter(s => s.groups.length)
-                //         .map(s => s.groups)
-                //         .forEach(p => pa.appendAll(p));
-                // }), (polish_update) => {
-                //     // console.log({polish_update});
-                // });
+                SLICER.sliceWidget(widget, {
+                    height: sdev.nozzleSize,
+                    swapX: false,
+                    swapY: true,
+                    simple: true
+                }, (polish_done => {
+                    widget.polish.y = polish_done
+                        .filter(s => s.groups.length)
+                        .map(s => s.groups)
+                        .forEach(p => pa.appendAll(p));
+                }), (polish_update) => {
+                    // console.log({polish_update});
+                });
                 // apply polishing finishes to layers
                 forSlices(1.0, 1.0, slice => {
                     if (slice.index >= polish) {
diff --git a/js/kiri-print.js b/js/kiri-print.js
index 8680adea..8370f6e2 100644
--- a/js/kiri-print.js
+++ b/js/kiri-print.js
@@ -597,7 +597,7 @@ var gs_kiri_print = exports;
         /**
          * @param {Polygon[]} polys
          */
-        function outputSparse(polys, bounds) {
+        function outputSparse(polys, extrude) {
             if (!polys) return;
             var proxy = polys.map(function(poly) {
                 return {poly: poly, first: poly.first(), last: poly.last()};
@@ -611,7 +611,7 @@ var gs_kiri_print = exports;
                     if (i === 0 && lp && lp.distTo2D(p) > retractDist && intersectsTop(lp,p)) {
                         retract();
                     }
-                    addOutput(preout, p, i === 0 ? 0 : sparseMult, printSpeed);
+                    addOutput(preout, p, i === 0 ? 0 : extrude, printSpeed);
                     lp = p;
                 });
             });
@@ -794,7 +794,7 @@ var gs_kiri_print = exports;
 
                 // then output solid and sparse fill
                 outputFills(next.fill_lines);
-                outputSparse(next.fill_sparse);
+                outputSparse(next.fill_sparse, sparseMult);
 
                 lastTop = next;
             }
@@ -806,7 +806,7 @@ var gs_kiri_print = exports;
         if (slice.tops.length) {
             let polish = slice.tops[0].polish;
             if (polish) {
-                outputTraces(polish, 0);
+                outputSparse(polish, 0);
             }
         }