diff --git a/src/kiri-mode/fdm/client.js b/src/kiri-mode/fdm/client.js
index ab961ee1..3c173f70 100644
--- a/src/kiri-mode/fdm/client.js
+++ b/src/kiri-mode/fdm/client.js
@@ -132,29 +132,18 @@ FDM.init = function(kiri, api) {
             };
           }
     }
-
     api.event.on("function.animate", (mode) => {
-        if (!isFdmMode) {
+        if (!(isFdmMode && lastView === VIEWS.PREVIEW)) {
             return;
         }
-        if (!api.conf.get().controller.danger) {
-            return;
-        }
-        let pct = 0;
-        let int = setInterval(() => {
-            if (pct <= 1) {
-                api.const.STACKS.setFraction(pct);
-                pct += 0.05;
-            } else {
-                api.const.STACKS.setFraction(1);
-                clearTimeout(int);
-            }
-        }, 50);
-        // let slider = $('top-slider');
-        // slider.style.display = 'flex';
-        // slider.oninput = slider.onchange = (ev) => {
-        //     api.const.STACKS.setFraction(parseInt(ev.target.value)/100);
-        // };
+        let slider = $('top-slider');
+        slider.style.display = 'flex';
+        slider.oninput = slider.onchange = (ev) => {
+            api.const.STACKS.setFraction(parseInt(ev.target.value)/1000);
+            api.space.update();
+        };
+        $('anim-slider').value = 500;
+        api.const.STACKS.setFraction(0.5);
     });
     api.event.on("mode.set", mode => {
         isFdmMode = mode === 'FDM';
@@ -166,6 +155,7 @@ FDM.init = function(kiri, api) {
         updateVisiblity();
     });
     api.event.on("view.set", view => {
+        $('top-slider').style.display = 'none';
         lastView = view;
         updateVisiblity();
         filterSynth();
diff --git a/src/kiri-mode/fdm/prepare.js b/src/kiri-mode/fdm/prepare.js
index edebbac1..2eb11feb 100644
--- a/src/kiri-mode/fdm/prepare.js
+++ b/src/kiri-mode/fdm/prepare.js
@@ -1171,7 +1171,7 @@ function slicePrintPath(print, slice, startPoint, offset, output, opt = {}) {
             lastIndex = -1,
             raft = opt.raft || false,
             flow = opt.flow || 1,
-            near = opt.near || false,
+            near = opt.near || (antiBacklash ? false : true),
             fast = opt.fast || false,
             fill = (opt.fill >= 0 ? opt.fill : fillMult) * flow,
             thinDist = near ? thinWall : thinWall;
@@ -1182,7 +1182,7 @@ function slicePrintPath(print, slice, startPoint, offset, output, opt = {}) {
             found = false;
             mindist = Infinity;
 
-            // use next nearest line strategy
+            // use next nearest line endpoint strategy
             if (near)
             for (let i=0; i<lines.length; i += 2) {
                 t1 = lines[i];
@@ -1192,7 +1192,9 @@ function slicePrintPath(print, slice, startPoint, offset, output, opt = {}) {
                 t2 = lines[i+1];
                 let d1 = t1.distToSq2D(startPoint);
                 let d2 = t2.distToSq2D(startPoint);
-                if (d1 < mindist || d2 < mindist) {
+                let idiff = startPoint.index ? Math.abs(startPoint.index - t1.index) : 1;
+                let min = Math.min(d1, d2) * (idiff !== 1 ? 10 : 1);
+                if (min < mindist) {
                     if (d2 < d1) {
                         p2 = t1;
                         p1 = t2;
@@ -1200,13 +1202,11 @@ function slicePrintPath(print, slice, startPoint, offset, output, opt = {}) {
                         p1 = t1;
                         p2 = t2;
                     }
-                    mindist = Math.min(d1, d2);
-                    lastIndex = i;
+                    mindist = min;
                 }
             }
 
-            // use next index line strategy
-            // order all points by distance to last point
+            // use next line index strategy (perpendicular offset from origin)
             if (!near)
             for (let i=start; i<lines.length; i += 2) {
                 p = lines[i];
@@ -1267,7 +1267,7 @@ function slicePrintPath(print, slice, startPoint, offset, output, opt = {}) {
             // re-seek a new start index within fill array
             let restart = lastIndex < 0;
 
-            // mark as used (temporarily)
+            // mark as used
             p1.del = true;
             p2.del = true;
             marked += 2;
@@ -1301,7 +1301,6 @@ function slicePrintPath(print, slice, startPoint, offset, output, opt = {}) {
                 } else {
                     print.addOutput(preout, p1, 0, moveSpeed, extruder);
                 }
-
                 print.addOutput(preout, p2, fill, fillSpeed, extruder);
             }
 
diff --git a/src/kiri/conf.js b/src/kiri/conf.js
index 2f449291..186feb34 100644
--- a/src/kiri/conf.js
+++ b/src/kiri/conf.js
@@ -382,7 +382,7 @@ const conf = exports({
                 sliceAdaptive: false,
                 zHopDistance: 0.2,
                 arcTolerance: 0,
-                antiBacklash: 1,
+                antiBacklash: 0,
                 ranges: []
             }
         },
diff --git a/web/kiri/index.css b/web/kiri/index.css
index c9762ed5..3bb82d06 100644
--- a/web/kiri/index.css
+++ b/web/kiri/index.css
@@ -2029,9 +2029,11 @@ th, tr, td, label {
 #top-slider {
     position: absolute;
     display: none;
-    top: 60px;
-    left: 50px;
+    top: 10px;
+    left: 35px;
     right: 50px;
+    z-index: 1000;
+    pointer-events: all;
 }
 #anim-slider {
     width: 100%;
diff --git a/web/kiri/index.html b/web/kiri/index.html
index 09a5f4e9..0ef7c29b 100644
--- a/web/kiri/index.html
+++ b/web/kiri/index.html
@@ -366,6 +366,10 @@
                     <div id="slider-max">&infin;</div>
                 </div>
             </div>
+            <!-- slice/preview layer slider -->
+            <div id="top-slider" class="f-col grow">
+                <input id="anim-slider" type="range" min="0" max="1000" value="0"></input>
+            </div>
         </div>
 
         <!-- allows right tray to slide/hide but still show speeds menu -->
@@ -594,11 +598,6 @@
         </div>
     </div>
 
-    <!-- slice/preview layer slider -->
-    <div id="top-slider" class="f-col grow">
-        <input id="anim-slider" type="range" min="0" max="1000" value="0"></input>
-    </div>
-
 </div>
 </body>
 </html>