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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 -7.5203 6.0001 facet normal -0.265121 -0.618898 0.739376 facet normal 5.282633e-07 -1.000000e+00 -5.537854e-07 facet normal 0.555694 -0.831387 -3.9701e-05 facet normal 8.472685e-07 -1.000000e+00 4.489925e-07 facet normal 5.559167e-02 -9.984535e-01 3.473349e-04 vertex -9.798339e+01 9.173363e+01 4.255000e+01 facet normal 7.902049e-001 -6.128428e-001 0.000000e+000 vertex -5.271722e+000 -4.739358e+000 1.747200e+001 facet normal 0.353615 -0.331801 0.874566 facet normal 0.40114 0.91331 -0.0703624 vertex 4.96807 8.78749 0.0491304 facet normal 1.028882e-001 9.946929e-001 0.000000e+000 facet normal -0.828697 0.0816152 0.553715 facet normal -0.915274 -0.396639 -0.0703619 facet normal 0.63438 -0.767815 0.0895698 vertex -0.759029 -6.57068 7.85151 facet normal 0.773019 -0.630109 0.0735129 facet normal -0.0989222 -0.0149092 -0.994983 facet normal 0.101047 0.992162 0.0735128 facet normal -0.584816 -0.805071 0.0992566 facet normal -0.0978932 0.995197 0 facet normal 0.172865 -0.0218118 0.984704 vertex -0.0879059 -7.39065 6.86646 facet normal -2.537104e-001 4.349549e-001 8.639706e-001 facet normal -2.208553e-01 9.753065e-01 -3.469761e-04 vertex -9.560112e+01 9.193318e+01 2.550000e+00 facet normal 3.314095e-15 -2.123847e-15 1.000000e+00 facet normal -3.267679e-001 -5.718436e-001 7.524744e-001 facet normal -0.0464246 -0.0868544 0.995139 vertex -7.51042 -0.100274 6.0001 facet normal 7.640483e-01 -6.451590e-01 -3.270579e-04 vertex -9.202104e+01 9.410860e+01 3.455000e+01 vertex -1.030077e+02 9.441667e+01 2.655000e+01 facet normal 0.956891 -0.290201 -0.0119544 vertex 2.67925 -1.10978 19 facet normal 0.898705 0.427228 0.0990185 vertex 9.29776 -3.68124 0 facet normal 3.734794e-001 -6.399524e-001 6.715460e-001 facet normal -0.0546376 0.554748 0.830223 facet normal 0.0816193 -0.828696 0.553715 facet normal 0.243781 -0.297047 0.923219 vertex 5.03481 7.45476 3.82299 facet normal 0.962631 0.191482 -0.191512 facet normal -7.377639e-01 0.000000e+00 -6.750588e-01 facet normal 0.362853 -0.678848 -0.63836 vertex -4.24264 -4.24264 6.59 facet normal -0.502124 0.30771 0.808199 vertex 2.80984 -0.516674 19.1916 facet normal -1.284290e-001 -2.247508e-001 9.659157e-001 vertex 2.614341e+000 4.497066e+000 2.494118e+001 vertex -4.168838e+000 7.693584e-001 2.494118e+001 facet normal 0.0819182 -0.0817958 -0.993277 vertex -2.97557 4.24331 21.7998 vertex 2.95564 4.03376 21.7809 vertex -2.97699 -3.82407 21.7653 vertex -3.69322 4.02975 21.8414 facet normal -0.499999 -0.866026 6.96236e-08 vertex 2.35938 1.82407 11.0482 facet normal 0.361949 -0.422682 0.830862 vertex -4.83932 5.54554 6.98393 facet normal 0.95132 0.288584.

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