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Height. The shaft length is also not counted. KnobHeight = 20; // Shape of top of the rail + a safety margin width_mm = hp_mm(h); difference() { union() { difference(){ color([.1,.1,.1]) panel(width); //module title(string, size=9, halign="center", font="Futura XBlk BT:style=Extra Black") { //} // draw panel, subtract holes union() { cube([board_width, board_height, thickness]); cylinder(thickness+standoff_height, r=standoff_radius, $fn=360); cube([cutout_width, cutout_height, thickness+3]); cylinder(h=thickness+standoff_height+3, r=hole_radius, $fn=360); vertex 0 7.10284 6.88658 facet normal 0.0895678 -0.0430285 0.995051 vertex -7.75279 1.99403 19.9467 facet.

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