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Subtract holes 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 3.04892 6.59 vertex 2.53249 -1.69705 6.59 vertex -1.17054 5.88471 6.59 facet normal 0.468298 -0.312748 -0.826369 vertex -2.31466 1.79825 18.88 facet normal -4.01859e-05 -0.0975714 -0.995229 facet normal -0.946351 -0.307486 0.0993545 facet normal 0.778617 0.416181 0.469626 vertex 4.93725 7.38912 5.07603 facet normal 0.286343 -0.118597 0.950759 facet normal 0.828706 -0.0816226 0.5537 facet normal 9.659165e-001 4.301044e-003 2.588180e-001 facet normal -0.116009 -0.00017977 -0.993248 vertex 0.82619 -5.40722 21.8351 facet normal -2.845744e-001 -4.980052e-001 8.191509e-001 vertex 2.567783e+000 4.415591e+000 2.488700e+001 facet normal -9.804906e-001 -3.879294e-003 1.965280e-001 vertex 4.049431e+000 -2.337682e+000 2.470887e+001 facet normal -0.845944 -0.52861 0.0703598 facet normal -6.576019e-07 -1.000000e+00 -5.462696e-07 vertex -1.045783e+02 9.665134e+01 1.212086e+01 facet normal 0.768509 0.630625 0.108196 facet normal -0.124364 -0.485049 0.865599 facet normal -0.634386 0.773016.

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