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On opposite sides of the rail + a safety margin // margins from edges h_margin = hole_dist_side + thickness; width_mm = hp_mm(width); // where to put the output from the top knob top_row = height - hole_dist_top); cube([flange, flange, h], center=true); if (Divot==2 } if (two_walls) { ## GitHub repository * [https://github.com/holmesrichards/precadsr](https://github.com/holmesrichards/precadsr ## Submodules This.

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