diff --git a/carriage.scad b/carriage.scad
index 7795891..d0f2c06 100644
--- a/carriage.scad
+++ b/carriage.scad
@@ -4,7 +4,7 @@ rod_separation = 70; // center to center
 rod_length = 400; 
 
 bushing_diameter = 15.4;
-bushing_length = 16.8;
+bushing_length = 16.4;
 bushing_separation = 24; // edge to edge; original carriage: 8
 
 belt_width = 6 ; // a little more, maybe 6.2