diff --git a/openscad/stress_test_models.scad~ b/openscad/stress_test_models.scad~
deleted file mode 100644
index 8412031..0000000
--- a/openscad/stress_test_models.scad~
+++ /dev/null
@@ -1,166 +0,0 @@
-#!/usr/bin/openscad -o /tmp/ignore.stl
-//
-// stress_test_models.scad
-// 20260317 ChatGPT
-// $Id$
-// $HeadURL$
-//
-// Example command lines:
-//
-//   openscad -D 'model="cube"'  -o cube_20260317_1335.stl  stress_test_models.scad
-//   openscad -D 'model="ybar"'  -o ybar_20260317_1335.stl  stress_test_models.scad
-//   openscad -D 'model="tower"' -o tower_20260317_1335.stl stress_test_models.scad
-//   openscad -D 'model="all"'   -o all_20260317_1335.stl   stress_test_models.scad
-//
-// Suggested slicer use:
-//
-//   1) Print each model as a SEPARATE run.
-//   2) For ybar, orient the LONG dimension along the printer's Y axis
-//      so the bed moves the long way front-to-back.
-//   3) Infill is set in Orca Slicer, not here.
-//
-// Suggested slicer settings:
-//
-//   cube:  0.20 layer, 3 perimeters, 20-25% grid or gyroid
-//   ybar:  0.20 layer, 3 perimeters, 15-25% grid
-//   tower: 0.20 layer, 3 perimeters, 0-10% infill, no brim at first;
-//          add brim only if adhesion becomes the issue rather than motion
-//
-
-/* [General] */
-model = "all";              // [cube,ybar,tower,all]
-center_models = false;      // true / false
-add_labels = true;          // true / false
-
-/* [Cube Dimensions] */
-cube_x = 40;
-cube_y = 40;
-cube_z = 40;
-
-/* [Y Bar Dimensions] */
-ybar_x = 20;
-ybar_y = 150;
-ybar_z = 50;
-
-/* [Tower Dimensions] */
-tower_x = 18;
-tower_y = 18;
-tower_z = 120;
-
-/* [Edge Treatment] */
-corner_radius = 1.2;        // 0 for sharp corners
-$fn = 48;
-
-/* [Labeling] */
-label_depth = 0.6;
-label_size  = 7;
-label_font  = "Liberation Sans:style=Bold";
-
-/* [Layout For model="all"] */
-gap_between_models = 20;
-
-
-// --------------------------------------------------
-// Main
-// --------------------------------------------------
-
-if (model == "cube") {
-    make_cube();
-}
-else if (model == "ybar") {
-    make_ybar();
-}
-else if (model == "tower") {
-    make_tower();
-}
-else if (model == "all") {
-    make_all();
-}
-else {
-    echo("ERROR: model must be one of: cube, ybar, tower, all");
-}
-
-
-// --------------------------------------------------
-// Assemblies
-// --------------------------------------------------
-
-module make_all() {
-    x0 = 0;
-    x1 = x0 + cube_x + gap_between_models;
-    x2 = x1 + ybar_x + gap_between_models;
-
-    translate([x0, 0, 0]) make_cube();
-    translate([x1, 0, 0]) make_ybar();
-    translate([x2, 0, 0]) make_tower();
-}
-
-
-module make_cube() {
-    difference() {
-        rounded_box(cube_x, cube_y, cube_z, corner_radius, center_models);
-        if (add_labels)
-            place_top_label("CUBE", cube_x, cube_y, cube_z, center_models);
-    }
-}
-
-
-module make_ybar() {
-    difference() {
-        rounded_box(ybar_x, ybar_y, ybar_z, corner_radius, center_models);
-        if (add_labels)
-            place_top_label("YBAR", ybar_x, ybar_y, ybar_z, center_models);
-    }
-}
-
-
-module make_tower() {
-    difference() {
-        rounded_box(tower_x, tower_y, tower_z, corner_radius, center_models);
-        if (add_labels)
-            place_top_label("TOWER", tower_x, tower_y, tower_z, center_models);
-    }
-}
-
-
-// --------------------------------------------------
-// Geometry helpers
-// --------------------------------------------------
-
-module rounded_box(x, y, z, r=0, center_it=false) {
-    if (r <= 0) {
-        cube([x, y, z], center=center_it);
-    } else {
-        if (center_it) {
-            translate([-x/2, -y/2, -z/2])
-                rounded_box_uncentered(x, y, z, r);
-        } else {
-            rounded_box_uncentered(x, y, z, r);
-        }
-    }
-}
-
-
-module rounded_box_uncentered(x, y, z, r) {
-    linear_extrude(height=z)
-        offset(r=r)
-            offset(delta=-r)
-                square([x, y], center=false);
-}
-
-
-module place_top_label(txt, x, y, z, center_it=false) {
-    tx = center_it ? 0 : x/2;
-    ty = center_it ? 0 : y/2;
-    tz = center_it ? z/2 : z;
-
-    translate([tx, ty, tz - label_depth])
-        linear_extrude(height=label_depth + 0.02)
-            text(
-                txt,
-                size=label_size,
-                font=label_font,
-                halign="center",
-                valign="center"
-            );
-}