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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 -8.97218 4.79464 facet normal -0.95694 -0.290287 5.63314e-06 facet normal -0.840151 -0.533195 0.0992474 facet normal 0.769325 -0.631363 0.0975683 facet normal -0.08206 0.0817216 0.993271 facet normal 7.148682e-16 -1.867343e-17 1.000000e+00 facet normal 3.370504e-001 5.903097e-001 7.334381e-001 vertex 3.789905e-002 -4.800489e+000 2.490742e+001 facet normal 0.587776 0.809024 -0 facet normal 1.98098e-05 -0.113182 0.993574 facet normal -0.865129 -0.462433 0.194183 facet normal 0.42307 -0.690389 0.586835 vertex 2.36512 -1.4028 19.9 facet normal 6.788764e-001 7.342526e-001 0.000000e+000 facet normal -0.595618 0.758295 0.265006 facet normal 0.989316 -0.0976054 0.108289 facet normal 3.121536e-001 -9.500316e-001 0.000000e+000 vertex 5.504529e+000 -4.517184e+000 9.983999e+000 vertex 2.614851e+000 6.540324e+000 2.496000e+001 vertex 7.057426e+000 7.134280e-001 1.747200e+001 facet normal -0.115344 0.000261241 0.993326 vertex 6.33956 -0.410784 7.82455 facet normal -9.062919e-001 -4.035546e-003 4.226330e-001 vertex 5.080098e+000 1.007521e+000 2.480400e+001 facet normal 4.961389e-001 8.682432e-001 -0.000000e+000 vertex 2.260702e-001 7.029575e+000 9.983999e+000 vertex 4.695738e+000 5.269281e+000 9.983999e+000 vertex -3.789330e-001 5.612119e+000 2.496000e+001 vertex -5.113995e+000 4.824093e+000 9.983999e+000 vertex 5.358002e+000 -1.912462e+000 1.747200e+001 facet normal -0.291191 -0.188007 0.938009 vertex -5.32576 4.95759 6.89409 facet normal -0.48977 0.507679 0.708793 facet normal -0.976236 0.0730219 0.204035 vertex 7.19679 1.05954 7.81812 facet normal 0.881916 -0.471406 0 vertex 8.47298 5.66146 2.19603 vertex 9.41467 -3.89968 2.19603 facet normal -0.0127267 -0.705404 0.708692 vertex 7.29119 -0.781299 7.20554 facet normal 3.693062e-13 -1.000000e+00 7.776002e-13 vertex -1.083783e+02 9.665134e+01 1.052415e+01 facet normal 0.262761 0.491592 0.830237 vertex 5.26058 7.87301 3.54602 vertex 7.91125 5.64888 3.26879 vertex 1.90135 9.55875 3.26879 vertex -6.50317 -6.85323 3.54602 facet normal -0.471394 0.881923 0 vertex 0 -6.57572 7.16319 facet normal -9.529315e-01 -3.031856e-01 -3.901305e-05 facet normal -0.0817378 0.828666 0.553744 facet normal 0.644981 0.00905415 0.764145 facet normal 5.991654e-08 -1.000000e+00 -7.418487e-07 facet normal 4.860397e-001 8.515486e-001 1.965460e-001 vertex 3.735342e-002 -4.677938e+000 2.470887e+001 facet normal 0.101034 0.992165 0.0734901 vertex -5.19155 4.11812 7.7465 vertex 4.98277 4.13938 7.73103 facet normal 0.223044 0.417286 0.880979 vertex 8.17421 -1.62595 5.74921 facet normal 4.883283e-001 -8.381327e-001 2.430414e-001 facet normal 0.0813916 0.0816537 0.993332 vertex 4.19228 4.77321 7.82455 facet normal -0.304188 -0.463283 -0.832369 vertex 1.60745 -2.41466 18.8956 facet normal -0.241727 -0.796857 0.553703 facet normal -9.529315e-01 -3.031856e-01 -3.901305e-05 facet normal -2.102315e-13 -1.000000e+00 -1.527974e-13 facet normal -4.561090e-001 7.804141e-001 4.276895e-001 facet normal -5.786627e-004 0.000000e+000 -9.999998e-001 facet normal 0.115745 -0.000168718 -0.993279 facet normal -4.496485e-001 -7.868857e-001 4.226431e-001 facet normal -0.528262 -0.643692 0.553714 facet normal 4.123376e-003 9.999915e-001 0.000000e+000 facet normal -0.630746 -0.768414 0.108161 facet.

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