topeak-mtx-tortec-expeditionrack-adapter: improve demo

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 731c7be3e085033fb454c11c9d30e3d973da4230..1895773d91f6f1e05e534109e04f993b3ab01a1c 100644 (file)
--- a/topeak-mtx-tortec-expeditionrack-adapter.scad
+++ b/topeak-mtx-tortec-expeditionrack-adapter.scad
@@ -390,13 +390,18 @@ module RackForDemo(){ ////toplevel
   rotate([-atan(rack_shear_ratio), 0,0])
     translate([0, rack_rail_y, brk_block_z/2 + rack_rail_y*rack_shear_ratio]) {
       for (m=[0]) mirror([m,0,0]) {
-        linextr(-50, 50 + rear_to_cross_rail)
+        linextr(-(50 + cross_rail_distance), 50 + rear_to_cross_rail)
          translate([rack_rail_x, 0])
          circle(r= rack_rail_dia/2);
        }
+
       translate([0,0, rear_to_cross_rail])
        linextr_x_yz(rack_rail_x, -rack_rail_x)
        circle(r= rack_rail_dia/2);
+
+      translate([0,0, rear_to_cross_rail - cross_rail_distance])
+       linextr_x_yz(rack_rail_x, -rack_rail_x)
+       circle(r= rack_rail_dia/2);
     }
 }