From 712a384c8bb2b7e7a4ee994f4429eb648092f5c6 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 24 Jul 2023 19:11:21 +0100
Subject: [PATCH] topeak-mtx-tortec-expeditionrack-adapter: conditional prong

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 topeak-mtx-tortec-expeditionrack-adapter.scad | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/topeak-mtx-tortec-expeditionrack-adapter.scad b/topeak-mtx-tortec-expeditionrack-adapter.scad
index f2bdf45..f5dce9d 100644
--- a/topeak-mtx-tortec-expeditionrack-adapter.scad
+++ b/topeak-mtx-tortec-expeditionrack-adapter.scad
@@ -332,8 +332,10 @@ module Principal(){
       }
 
       FamLinextr(){
-	rectfromto([ -foreaftmaint_top_block_zs[0] + bolt_z, 0 ],
-		   [ -foreaftmaint_top_block_zs[1] + bolt_z, block_y_min] );
+	if ($foreaftmaint_rail_z > foreaftmaint_top_block_zs[0] - bolt_z) {
+	  rectfromto([ -foreaftmaint_top_block_zs[0] + bolt_z, 0 ],
+		     [ -foreaftmaint_top_block_zs[1] + bolt_z, block_y_min] );
+	}
 	FamGraspElevation();
       }
       intersection(){
-- 
2.30.2