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Knob working_width = width_mm - thickness*2; union() { cube([board_width, board_height, thickness]); cylinder(thickness+standoff_height, r=standoff_radius, $fn=360); cylinder(h=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 -6.25374 7.81454 facet normal 6.60207e-05 0.115483 0.993309 facet normal -0.124598 -0.886057 0.446518 facet normal -7.640483e-01 6.451590e-01 -1.719442e-04 facet normal 0.916106 -0.277896 0.289006 facet normal 0.88186 0.471361 -0.0119414 facet normal -0.865137 -0.462425 0.194169 facet normal 6.870092e-01 -7.266486e-01 -3.334842e-04 vertex -9.259138e+01 9.353824e+01 1.055000e+01 facet normal 0.098015 -0.995185 3.57647e-06 facet normal -0.129508 -0.7808 0.611211 vertex -5.40021 4.41978 7.20613 facet normal 2.170014e-13 -1.000000e+00 -4.708072e-14 facet normal -0.0974461 -0.989341 0.108206 facet normal -0.0992487 -0.989167.

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