poster-tube-lid: tune a bit

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index 495b238b6ce6912ddc06d70b6a69a6b1f972b687..d3b89ff0959434e715ab3009170cc31b09d410b9 100644 (file)
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -5,7 +5,7 @@ top_thick_middle = 4;
 top_thick_by_oring = 3.0;
 top_middle_dr = 11;
 
-main_cnr = 4.0;
+main_cnr = 6.0;
 
 rivet_posn = 6.0;
 rivet_thick = 1.67;