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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 7.34398 6.86102 vertex 7.34599 -0.0206242 6.86125 facet normal -3.314196e-15 -2.124071e-15 1.000000e+00 facet normal -0.237828 0.388082 0.89041 vertex 4.91667 -1.59016 19.1916 vertex 4.77842 1.16465 18.9636 facet normal 9.438660e-14 -1.000000e+00 9.000809e-14 facet normal -0.0759151 -0.77078 0.632562 facet normal 0.288584 0.95132 0.108209 vertex -5.48554 -1.87874 21.335 facet normal 0.885449 0.0559554 0.461356 facet normal -8.426097e-01 5.385247e-01 -3.216361e-04 vertex -9.121820e+01 1.026046e+02 2.550000e+00 facet normal 3.385610e-001 -5.800993e-001 7.408517e-001 facet normal -0.388502 -0.486762 0.782387 facet normal -0.0816197 -0.758952 0.646011 facet normal 2.011253e-03 -0.000000e+00 9.999980e-01 facet.

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