diff --git a/sprocketed_roller_var.scad b/sprocketed_roller_var.scad
index 91be7e8..55147a0 100644
--- a/sprocketed_roller_var.scad
+++ b/sprocketed_roller_var.scad
@@ -102,7 +102,7 @@ module sprocketed_roller_sprocket_wheel (pos = [0, 0, 0], rot = [0, 0, 0], sproc
     }
 }
 
-module sprocketed_roller_body (pos = [0, 0, 0], rot = [0, 0, 0], sprockets = 8, bevel = false, reinforced = false, bolts = false) {
+module sprocketed_roller_body (pos = [0, 0, 0], rot = [0, 0, 0], sprockets = 8, bevel = false, reinforced = false, bolts = false, adjust_base = 0) {
     D = (FrameC * sprockets) / PI;
     LipD = (LipC * sprockets) / PI;
     TopD = (TopC * sprockets) / PI;
@@ -132,20 +132,20 @@ module sprocketed_roller_body (pos = [0, 0, 0], rot = [0, 0, 0], sprockets = 8,
                 cylinder(r = R(InnerD), h = InnerH, center = true);
             }
 
-            //lip
+            //top lip
             translate([0, 0, (TopBaseH / 2) + InnerH + (SprocketBaseH / 2) - (TopBaseH / 2) + (LipH / 2)]) {
                 cylinder(r = R(LipD), h = LipH, center = true);
             }
 
-            //bottom
-            translate([0, 0, (TopH / 2) + (TopBaseH / 2) + InnerH + (SprocketBaseH / 2) + (TopBaseH / 2) - (LipH / 2)]) {
-                cylinder(r = R(TopD), h = TopH, center = true);
-            }
-
-            //bottom base
+            //bottom lip
             translate([0, 0, (TopBaseH / 2) + InnerH + (SprocketBaseH / 2)]) {
                 cylinder(r = R(TopBaseD), h = TopBaseH, center = true);
             }
+
+            //base
+            translate([0, 0, (TopH / 2) + (TopBaseH / 2) + InnerH + (SprocketBaseH / 2) + (TopBaseH / 2) - (LipH / 2)]) {
+                cylinder(r = R(TopD + adjust_base), h = TopH, center = true);
+            }
         }
         if (reinforced && bolts) {
             m3_bolt_void([0, BoltsY/2, 0]);
@@ -154,12 +154,11 @@ module sprocketed_roller_body (pos = [0, 0, 0], rot = [0, 0, 0], sprockets = 8,
     }
 }
 
-module sprocketed_roller (pos = [0, 0, 0], rot = [0, 0, 0], sprockets = 8, bevel = false, reinforced = false, bolts = false, model = "", set_screw_side = true, set_screw_top = false) {
+module sprocketed_roller (pos = [0, 0, 0], rot = [0, 0, 0], sprockets = 8, bevel = false, reinforced = false, bolts = false, model = "", set_screw_side = true, set_screw_top = false, adjust_base = 0) {
     D = (FrameC * sprockets) / PI;
     difference () {
         union () {
-            sprocketed_roller_body(pos = pos, rot = rot, sprockets = sprockets, bevel = bevel, reinforced = reinforced, bolts = bolts);
-            //translate(pos) rotate(rot) addition();
+            sprocketed_roller_body(pos = pos, rot = rot, sprockets = sprockets, bevel = bevel, reinforced = reinforced, bolts = bolts, adjust_base = adjust_base);
         }
         if (model == "gearbox_motor") {
             translate(pos) rotate(rot) translate([0, 0, 10]) gearbox_motor_shaft_void();