topeak-mtx-tortec-expeditionrack-adapter: fixes from v1

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 7fe49a541872ce9526d364a3d7a5879ed24968ad..5b88c9711b156e880b30522478748fbed675aefd 100644 (file)
--- a/topeak-mtx-tortec-expeditionrack-adapter.scad
+++ b/topeak-mtx-tortec-expeditionrack-adapter.scad
@@ -13,7 +13,7 @@ $strf = 1;
 brk_recess_actual = 5.20;
 
 rack_rail_dia = 10.40 + 0.50;
-rack_width_inner = 115.86 + 1.0; // between insides of rails
+rack_width_inner = 115.86 - 1.0; // between insides of rails
 
 rear_elevation_nominal = 10.04;
 // ^ top of rack to bottom of bracket, at rear bolt hold
@@ -43,6 +43,8 @@ brk_overall_w = 90.07;
 
 fit_slope_len = 5;
 
+// "foreaftmaint" aka "fam" is the hook-like part that stops
+// the adapter sliding forwards/backwards along the rails
 foreaftmaint_r_slop = 0.75;
 
 main_sz_y = $strf * 18;
@@ -59,7 +61,7 @@ main_sz_z = beside_strap_sz*2 + strap_w;
 main_sz_x_fam = main_sz_y;
 
 brk_bottom_y = -brk_recess_actual;
-adapt_main_top_y = brk_bottom_y + general_gap_y;
+adapt_main_top_y = brk_bottom_y - general_gap_y;
 
 // on LHS, so -ve
 rack_rail_x = -(rack_width_inner/2 + rack_rail_dia/2);