diff --git a/air_tank_mount.scad b/air_tank_mount.scad
index af55350..743f442 100644
--- a/air_tank_mount.scad
+++ b/air_tank_mount.scad
@@ -39,7 +39,7 @@ module air_tank_mount_v2() {
     }
 }
 
-module axleround(h = 24, axleradius = 2.4, axlemesh = 1.85) {
+module axleround(h = 24, axleradius = 2.3, axlemesh = 1.7) {
     translate([0, 0, -h/2]) difference() {
         cylinder($fn=16, r=axleradius, h=h);
         translate([axlemesh/2, axlemesh/2, -1]) cube([axleradius, axleradius, h+2]);
diff --git a/gear-v3.scad b/gear-v3.scad
index 697aeee..8defaec 100644
--- a/gear-v3.scad
+++ b/gear-v3.scad
@@ -30,17 +30,24 @@
 
 // Standard LEGO dimensions:
 // Stud spacing = 8mm
+// Studded beam height = 9.6mm
+// Most beams, mounts and etc are 7.2mm thick in cross direction (i.e. beam is 8mm x 7.2mm, half-bush has 7.2mm radius etc)
 // Hole diameter (ideal) = 4.8mm
 // Hole diameter (for FDM printing) = 5.0-5.1mm
 // Pin holes (on beams etc) have ending notches that are 0.8mm deep and 3mm in radius (i.e. diameter is 6mm)
-// Axle mesh thickness = 1.85mm
-// Thickness of all gear wheels is 3.8mm
+// 0.8mm thick are also various borders like ones on the end of a full bush
+// Inner bush diameter = 5.7mm
+// Axle diameter = 4.6mm
+// Axle mesh thickness = 1.7mm
+// Screw gear outer radius = 9.8mm
+// Thickness of normal (non-bevel) gear wheels is 3.8mm
 // Standard 40t gear: root_radius=18.75 outer_radius=20.85 (mm_per_tooth =~ 3.1 by root)
 // Standard 24t gear: root_radius=10.7 outer_radius=12.8 (mm_per_tooth =~ 3.06 by root)
 // Standard 16t gear: root_radius=6.8 outer_radius=8.7 (mm_per_tooth =~ 3.05 by root)
 // Standard 8t gear: root_radius=2.8 outer_radius=4.9 (mm_per_tooth =~ 3.05 by root)
 // Standard 12t bevel gear: 12.7mm bottom diameter, 1.6mm top teeth length, 10.6mm top teeth outer diameter, 7.7mm top teeth root diameter, 2.5mm gear height + 0.5mm flat base + 1mm spacer at bottom
 // Standard 20t idler bevel gear: 20.4mm bottom diameter, 18.4mm top teeth outer diameter, 1.8mm top teeth length, 15.6mm top teeth root diameter
+// Standard 36t double bevel gear: 37.2mm teeth outer diameter, 31.6mm teeth root diameter, 2.5mm central non-bevel part thickness, 7.2mm total thickness
 
 // Formulas for gear radiuses:
 //outer_radius = mm_per_tooth*(n_teeth/2+1)/3.1415926 - clearance;
diff --git a/torsen.scad b/torsen.scad
index ee63fa7..2e631a6 100644
--- a/torsen.scad
+++ b/torsen.scad
@@ -20,30 +20,30 @@ module torsen_diff_36t() {
         }
         translate([0, 0, 8]) difference() {
             union() {
-                translate([0, 8, 0]) rotate([90, 0, 90]) cylinder(r=2.8, h=8, center=true);
-                translate([0, 8-2.8, 0]) cube([8, 2.8*2, 2.8*2], center=true);
-                translate([-3.6, 8, 0]) rotate([90, 0, 90]) cylinder(r=3.6, h=0.8, center=true);
-                translate([-3.6, 8-3.6, 0]) cube([0.8, 3.6*2, 3.6*2], center=true);
-                translate([3.6, 8, 0]) rotate([90, 0, 90]) cylinder(r=3.6, h=0.8, center=true);
-                translate([3.6, 8-3.6, 0]) cube([0.8, 3.6*2, 3.6*2], center=true);
-                translate([0, 8, 0]) rotate([90, 0, 90]) axleround(h=16, axlemesh=1.7);
+                translate([0, 8, 0]) rotate([90, 0, 90]) cylinder(r=2.8, h=7.2, center=true);
+                translate([0, 8-2.8, 0]) cube([7.2, 2.8*2, 2.8*2], center=true);
+                translate([-3.2, 8, 0]) rotate([90, 0, 90]) cylinder(r=3.6, h=0.8, center=true);
+                translate([-3.2, 8-3.2, 0]) cube([0.8, 3.6*2, 3.6*2], center=true);
+                translate([3.2, 8, 0]) rotate([90, 0, 90]) cylinder(r=3.6, h=0.8, center=true);
+                translate([3.2, 8-3.2, 0]) cube([0.8, 3.6*2, 3.6*2], center=true);
+                translate([0, 8, 0]) rotate([90, 0, 90]) axleround(h=16);
             }
         }
         translate([0, 0, -8]) difference() {
             union() {
-                translate([0, 8, 0]) rotate([90, 0, 90]) cylinder(r=2.8, h=8, center=true);
-                translate([0, 8-2.8, 0]) cube([8, 2.8*2, 2.8*2], center=true);
-                translate([-3.6, 8, 0]) rotate([90, 0, 90]) cylinder(r=3.6, h=0.8, center=true);
-                translate([-3.6, 8-3.6, 0]) cube([0.8, 3.6*2, 3.6*2], center=true);
-                translate([3.6, 8, 0]) rotate([90, 0, 90]) cylinder(r=3.6, h=0.8, center=true);
-                translate([3.6, 8-3.6, 0]) cube([0.8, 3.6*2, 3.6*2], center=true);
-                translate([0, 8, 0]) rotate([90, 0, 90]) axleround(h=16, axlemesh=1.7);
+                translate([0, 8, 0]) rotate([90, 0, 90]) cylinder(r=2.8, h=7.2, center=true);
+                translate([0, 8-2.8, 0]) cube([7.2, 2.8*2, 2.8*2], center=true);
+                translate([-3.2, 8, 0]) rotate([90, 0, 90]) cylinder(r=3.6, h=0.8, center=true);
+                translate([-3.2, 8-3.2, 0]) cube([0.8, 3.6*2, 3.6*2], center=true);
+                translate([3.2, 8, 0]) rotate([90, 0, 90]) cylinder(r=3.6, h=0.8, center=true);
+                translate([3.2, 8-3.2, 0]) cube([0.8, 3.6*2, 3.6*2], center=true);
+                translate([0, 8, 0]) rotate([90, 0, 90]) axleround(h=16);
             }
         }
     }
 }
 
-module axleround(h = 24, axleradius = 2.4, axlemesh = 1.85) {
+module axleround(h = 24, axleradius = 2.3, axlemesh = 1.7) {
     translate([0, 0, -h/2]) difference() {
         cylinder($fn=16, r=axleradius, h=h);
         translate([axlemesh/2, axlemesh/2, -1]) cube([axleradius, axleradius, h+2]);
@@ -53,13 +53,6 @@ module axleround(h = 24, axleradius = 2.4, axlemesh = 1.85) {
     }
 }
 
-module axle(h = 24, axleradius = 2.4, axlemesh = 1.85) {
-    union() {
-        cube([axleradius*2, axlemesh, h], center=true);
-        cube([axlemesh, axleradius*2, h], center=true);
-    }
-}
-
 module single_bevel(nteeth = 28) {
     union() {
         intersection() {