diff --git a/src/kiri/layers.js b/src/kiri/layers.js
index caa7ec8e..8d73a35d 100644
--- a/src/kiri/layers.js
+++ b/src/kiri/layers.js
@@ -85,6 +85,9 @@
         }
 
         addPolys(polys, options) {
+            if (options && options.clean) {
+                polys = polys.map(p => p.clean());
+            }
             if (options && options.flat) {
                 return this.addFlats(polys, options);
             }
diff --git a/src/kiri/worker.js b/src/kiri/worker.js
index 4d18136a..d74a5854 100644
--- a/src/kiri/worker.js
+++ b/src/kiri/worker.js
@@ -6,6 +6,7 @@ let BASE = self.base,
     KIRI = self.kiri,
     UTIL = BASE.util,
     time = UTIL.time,
+    qtpi = Math.cos(Math.PI/4),
     current = self.worker = {
         print: null,
         snap: null
@@ -122,6 +123,9 @@ KIRI.worker = {
             let ypos = settings.device.bedDepth / 2 + track.pos.y + miny;
             let rotation = (Math.PI / 180) * 45;
 
+            // move to accomodate anchor
+            ypos += (settings.process.firstLayerBeltLead || 0);
+
             widget.rotate(rotation,0,0,true);
             let minr = gmin(group);
             widget.belt = { xpos, ypos, yadd: minr.maxy - minr.miny };
@@ -147,6 +151,8 @@ KIRI.worker = {
             let { dy, dz } = widget.track.center;
             widget.groupBounds();
             let { xpos, ypos } = widget.belt;
+            // move to accomodate anchor
+            dy -= (settings.process.firstLayerBeltLead || 0) ;
             widget.rotinfo = { angle: 45, dy, dz, xpos, ypos };
             for (let others of group.slice(1)) {
                 others.rotinfo = widget.rotinfo;
diff --git a/src/mode/fdm/prepare.js b/src/mode/fdm/prepare.js
index 3e8374de..12ea5b3a 100644
--- a/src/mode/fdm/prepare.js
+++ b/src/mode/fdm/prepare.js
@@ -413,7 +413,7 @@
                 // output seek to start point between mesh slices if previous data
                 printPoint = print.slicePrintPath(
                     slice,
-                    slice.belt && slice.belt.touch ? newPoint(-wtb.w, wtb.d * 2, 0) : printPoint.sub(offset),
+                    slice.belt && slice.belt.touch ? newPoint(-5000, 0, 0) : printPoint.sub(offset),
                     offset,
                     layerout,
                     {
diff --git a/src/mode/fdm/slice.js b/src/mode/fdm/slice.js
index 688d3c40..70e5aef4 100644
--- a/src/mode/fdm/slice.js
+++ b/src/mode/fdm/slice.js
@@ -339,7 +339,7 @@
                             maxx = Math.max(maxx, poly.bounds.maxx);
                         }
                     }
-                    if (Math.abs(slice.belt.miny - smin) < 0.001) {
+                    if (Math.abs(slice.belt.miny - smin) < 0.01) {
                         slice.belt.touch = true;
                         if (!start) start = slice;
                     }
@@ -350,6 +350,12 @@
                 while (start.up && start.topShells().length === 0) {
                     start = start.up;
                 }
+                // if a brim applies, add that width to anchor
+                let brim = getRangeParameters(settings, 0).firstLayerBrim || 0;
+                if (brim) {
+                    minx -= brim;
+                    maxx += brim;
+                }
                 while (offset && start && offset >= sliceHeight) {
                     let addto = start.down;
                     if (!addto) {
@@ -478,7 +484,7 @@
 
             if (top.shells) output
                 .setLayer("shells", isSynth ? COLOR.support : COLOR.shell)
-                .addPolys(top.shells, vopt({ offset, height }));
+                .addPolys(top.shells, vopt({ offset, height, clean: true }));
 
             if (top.gaps) output
                 .setLayer("gaps", COLOR.gaps)
diff --git a/web/kiri/lang/en.js b/web/kiri/lang/en.js
index e746bec4..496a66fd 100644
--- a/web/kiri/lang/en.js
+++ b/web/kiri/lang/en.js
@@ -287,9 +287,9 @@ kiri.lang['en-us'] = {
     fl_lahi_s:      "layer height",
     fl_lahi_l:      ["height of each slice","in millimeters","should be >= slice height"],
     fl_rate_s:      "shell speed",
-    fl_rate_l:      ["shell printing max speed","in millimeters / minute"],
+    fl_rate_l:      ["shell printing max speed","in millimeters / second"],
     fl_frat_s:      "fill speed",
-    fl_frat_l:      ["fill printing max speed","in millimeters / minute"],
+    fl_frat_l:      ["fill printing max speed","in millimeters / second"],
     fl_mult_s:      "flow factor",
     fl_mult_l:      ["extrusion multiplier","0.0 - 2.0"],
     fl_sfac_s:      "width factor",
@@ -366,7 +366,7 @@ kiri.lang['en-us'] = {
     cc_sdwn_s:      "step down",
     cc_sdwn_l:      ["step down depth","for each pass","in workspace units","0 to disable"],
     cc_feed_s:      "feed rate",
-    cc_feed_l:      ["max cutting speed in","workspace units / minute"],
+    cc_feed_l:      ["max cutting speed in","workspace units / second"],
     cc_plng_s:      "plunge rate",
     cc_plng_l:      ["max z axis speed in","workspace units / minute"],
     cc_sngl_s:      "select lines only",
@@ -481,7 +481,7 @@ kiri.lang['en-us'] = {
     ou_powr_s:      "power",
     ou_powr_l:      ["0 - 100","represents %"],
     ou_sped_s:      "speed",
-    ou_sped_l:      "millimeters / minute",
+    ou_sped_l:      "millimeters / second",
     ou_mrgd_s:      "merged",
     ou_mrgd_l:      ["merge all layers using","color coding to denote","stacking depth"],
     ou_grpd_s:      "grouped",
@@ -499,11 +499,11 @@ kiri.lang['en-us'] = {
     ou_bedd_s:      "bed temp",
     ou_bedd_l:      "degrees in celsius",
     ou_feed_s:      "print speed",
-    ou_feed_l:      ["max print speed","millimeters / minute"],
+    ou_feed_l:      ["max print speed","millimeters / second"],
     ou_fini_s:      "finish speed",
-    ou_fini_l:      ["outermost shell speed","millimeters / minute"],
+    ou_fini_l:      ["outermost shell speed","millimeters / second"],
     ou_move_s:      "move speed",
-    ou_move_l:      ["non-print move speed","millimeters / minute","0 = enable G0 moves"],
+    ou_move_l:      ["non-print move speed","millimeters / second","0 = enable G0 moves"],
     ou_shml_s:      "shell factor",
     ou_flml_s:      "solid factor",
     ou_spml_s:      "infill factor",
@@ -581,7 +581,7 @@ kiri.lang['en-us'] = {
     ad_play_s:      "polish layers",
     ad_play_l:      ["polish up to specified","# of layers at a time"],
     ad_pspd_s:      "polish speed",
-    ad_pspd_l:      ["polishing speed","in millimeters / minute"],
+    ad_pspd_l:      ["polishing speed","in millimeters / second"],
     ad_purg_s:      "purge tower",
     ad_purg_l:      ["enable purge tower","for multiple extruders"],