poster-tube-lid: an assumption

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index 730b992763267f03d70b7d196cc9b7f96ca26977..aa72107f5283b1443ec8ac1487b45061579c4805 100644 (file)
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -95,7 +95,6 @@ sm_closure_cnr = 3.0;
 
 wm_thick = 5;
 wm_screw_dia = 4.5; // Timco wood screw 40mm, use brown plug
-wm_screwdriver_dia = 8.0; // XXX
 wm_screw_around = 5.0;
 wm_screw_slot = 3.5;
 wm_screw_head = 8.0;
@@ -184,6 +183,7 @@ sm_inner_rad = (sm_inner_circum + sm_bolt_tighten_allow/2) / TAU;
 sm_outer_rad = sm_inner_rad + sm_main_thick;
 
 wm_main_width = sm_main_width;
+wm_screwdriver_dia = wm_screw_head;
 wm_y_min = sqrt( pow(sm_inner_rad, 2) -
                 pow(sm_inner_rad - (wm_thick - sm_main_thick), 2) );
 wm_y_screw = wm_y_min + wm_screw_around + wm_screw_dia/2;