diff --git a/app/data/cfg.json b/app/data/cfg.json
index 8666b43..bc5fd0b 100644
--- a/app/data/cfg.json
+++ b/app/data/cfg.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.8.12",
+  "version": "1.8.13",
   "ext_port": 1111,
   "profiles": {
     "mcopy": {
diff --git a/app/package-lock.json b/app/package-lock.json
index c346c6d..3b00b6b 100644
--- a/app/package-lock.json
+++ b/app/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "mcopy-app",
-  "version": "1.8.12",
+  "version": "1.8.13",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
diff --git a/app/package.json b/app/package.json
index 3410a8e..698f133 100644
--- a/app/package.json
+++ b/app/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mcopy-app",
-  "version": "1.8.12",
+  "version": "1.8.13",
   "description": "GUI for the mcopy small gauge film optical printer platform",
   "main": "main.js",
   "scripts": {
diff --git a/data/cfg.json b/data/cfg.json
index 8666b43..bc5fd0b 100644
--- a/data/cfg.json
+++ b/data/cfg.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.8.12",
+  "version": "1.8.13",
   "ext_port": 1111,
   "profiles": {
     "mcopy": {
diff --git a/package-lock.json b/package-lock.json
index 02ff7be..ae535dd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "mcopy",
-  "version": "1.8.12",
+  "version": "1.8.13",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "mcopy",
-      "version": "1.8.12",
+      "version": "1.8.13",
       "license": "MIT",
       "dependencies": {
         "arduino": "file:app/lib/arduino",
diff --git a/package.json b/package.json
index ed75898..98593d7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mcopy",
-  "version": "1.8.12",
+  "version": "1.8.13",
   "description": "Small gauge film optical printer platform",
   "main": "build.js",
   "directories": {
diff --git a/processing/mcopy/cfg.json b/processing/mcopy/cfg.json
index 8666b43..bc5fd0b 100644
--- a/processing/mcopy/cfg.json
+++ b/processing/mcopy/cfg.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.8.12",
+  "version": "1.8.13",
   "ext_port": 1111,
   "profiles": {
     "mcopy": {
diff --git a/scad/mcopy_rails.scad b/scad/mcopy_rails.scad
index 3127d32..8797b30 100644
--- a/scad/mcopy_rails.scad
+++ b/scad/mcopy_rails.scad
@@ -32,8 +32,8 @@ module m3_bolt_void (pos = [0, 0, 0], BoltH = 20, CapH = 3) {
 	}
 }
 
-module bolt_voids_2020 (pos = [0, 0, 0]) {
-    translate(pos) {
+module bolt_voids_2020 (pos = [0, 0, 0], rot = [0, 0, 0]) {
+    translate(pos) rotate (rot) {
         //translate([0, -25, 0]) rotate([90, 0, 0]) m3_bolt_void(CapH = 6);
         translate([0, 20, 0]) rotate([-90, 0, 0]) m3_bolt_void(CapH = 20);
         translate([-16, 0, 0]) rotate([0, -90, 0]) m3_bolt_void(CapH = 6, BoltH = 10);
@@ -94,8 +94,8 @@ module rail_end (pos = [0, 0, 0], rot = [90, 0, 0], Motors = true) {
             translate([RailSpacing / 2, 0, 5]) cube([RailVoid, RailVoid, 40], center = true);
             
             //rails bolts
-            bolt_voids_2020([-RailSpacing / 2, 0, -15 + 5 + 6 ]);
-            rotate([0, 180, 0]) bolt_voids_2020([-RailSpacing / 2, 0,  -15 + 5 + 6]);
+            bolt_voids_2020([-RailSpacing / 2, 0, -15 + 5 + 7 ]);
+            bolt_voids_2020([RailSpacing / 2, 0, -15 + 5 + 7], [0, 180, 0]);
             
             if (Motors) {
                 //camera drive motor
@@ -110,8 +110,8 @@ module rail_end (pos = [0, 0, 0], rot = [90, 0, 0], Motors = true) {
                     bolt_voids_motor([0, 0, 16 - 21]);
                 }
             } else {
-                translate([-ThreadedRodSpacing / 2, 0, 0]) cylinder(r = R(LinearBearingOuterDiameter + 0.5), h = 60, center = true, $fn = 100);
-                translate([-ThreadedRodSpacing / 2, 0, 0]) cylinder(r = R(LinearBearingOuterDiameter + 0.5), h = 60, center = true, $fn = 100);
+                translate([ThreadedRodSpacing / 2, 0, 0]) cylinder(r = R(LinearBearingOuterDiameter + 0.4), h = 60, center = true, $fn = 100);
+                translate([-ThreadedRodSpacing / 2, 0, 0]) cylinder(r = R(LinearBearingOuterDiameter + 0.4), h = 60, center = true, $fn = 100);
             }
             
             //linear motion rod
@@ -293,10 +293,12 @@ module debug () {
 }
 
 
-PART = "bearing_rollerx";
+PART = "rail_end";
 
 if (PART == "rail_end") {
     rail_end();
+} else if (PART == "rail_end_idle") {
+    rail_end(Motors = false);
 } else if (PART == "lens_sled") {
     lens_sled();
 } else if (PART == "bearing_roller") {
diff --git a/scripts/openscadPart.sh b/scripts/openscadPart.sh
index 68579fd..4962827 100644
--- a/scripts/openscadPart.sh
+++ b/scripts/openscadPart.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-openscad -o "./stl/${3}" -D"PART=\"${2}\"" "./scad/${1}"
+openscad --enable=fast-csg -o "./stl/${3}" -D"PART=\"${2}\"" "./scad/${1}"
 echo "Compiled ${3} from ${1}"
 if [ -f "./scad/common/c14n_stl.py" ]; then
 	python3 ./scad/common/c14n_stl.py "./stl/${3}"