topeak-mtx-tortec-expeditionrack-adapter: fam extra block fix

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

diff --git a/topeak-mtx-tortec-expeditionrack-adapter.scad b/topeak-mtx-tortec-expeditionrack-adapter.scad
index d28e559c28e883ff5eb2c101d0db293188dbd906..e9089712a6e5efbd4e17bc2f94f7b4d4b70a8d2c 100644 (file)
--- a/topeak-mtx-tortec-expeditionrack-adapter.scad
+++ b/topeak-mtx-tortec-expeditionrack-adapter.scad
@@ -64,6 +64,8 @@ $fs=1;
 
 // calculated
 
+bolt_z = -brk_block_z/2;
+
 main_sz_rhs_z = max(min_on_rail_sz_z, beside_strap_sz*2 + strap_w);
 main_sz_lhs_z = min_on_rail_sz_z;
 
@@ -293,8 +295,8 @@ module Principal(){
       FamLinextr(){
        rectfromto([ -$foreaftmaint_rail_z, adapt_main_top_y ],
                   [ 0, block_y_min]);
-       rectfromto([ -foreaftmaint_top_block_zs[0], 0 ],
-                  [ -foreaftmaint_top_block_zs[1], block_y_min] );
+       rectfromto([ -foreaftmaint_top_block_zs[0] + bolt_z, 0 ],
+                  [ -foreaftmaint_top_block_zs[1] + bolt_z, block_y_min] );
        FamGraspElevation();
       }
       RackShear()