1 files changed, 2 insertions, 2 deletions

diff --git a/pushfittery.scad b/pushfittery.scad
index ee3bbd0..6b6ec2e 100644
--- a/pushfittery.scad
+++ b/pushfittery.scad
@@ -1,5 +1,5 @@
-layer_height=.2;
+layer_height=.2; epsilon=.01;
 draft = true;
 
 use <threads.scad>;
 
@@ -14,9 +14,9 @@ module pushfit(pf,draft=draft) {
   minch = 25.4;
   d = (pf_d(pf) + pf_(pf,"d_tolerance"))/minch;
   tpi = pf_(pf,"tpi");
   if(draft) cylinder(d=d*minch,h=h+epsilon);
-  else english_thread(diameter=d,threads_per_inch=tpi,length=h/minch+epsilon,internal=true);
+  else english_thread(diameter=d,threads_per_inch=tpi,length=(h+epsilon)/minch,internal=true);
   slitl = d*minch+layer_height;
   slitw = 0.8*d*minch/2;
   echo(slitw,slitl);
   translate([-slitw/2,-slitl/2,0]) cube([slitw,slitl,h+epsilon]);