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Hole, set this to zero. ScrewHoleDiameter = 3; difference() { 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 8.88682 5.07603 facet normal 0.630636 0.768498 0.108209 vertex -1.87874 5.48554 21.335 vertex -6.91995 -1.06598 10.3435 facet normal -8.512361e-001 -5.247829e-001 0.000000e+000 vertex -5.605745e+000 6.171317e-001 1.747200e+001 facet normal -0.0546401 -0.554737 0.83023 facet normal -0.0825968 -0.0807457 0.993307 vertex -5.16186 5.26759 6.86461 vertex -5.23616 -5.23616 6.86814 facet normal 0.634804 -0.772589 0.0114014 vertex 5.83811 -4.33969 7.81812 facet normal -0.768469 0.630673 0.108201 facet normal -0.876744 0.468627 0.108209 facet normal -0.980785 -0.195093 -2.07266e-07 facet normal 9.413415e-01 -4.649372e-03 -3.374233e-01 vertex -1.052358e+02 9.695134e+01 1.067174e+01 facet normal 0.633165 -0.0623612 0.771501 facet normal 0.881916 0.471406 0 vertex -1.76777 1.76777 6.7 vertex -0.956708 2.3097 6.5 facet normal -0.292516 0.954699 0.0546275 facet normal 0.291191 -0.188007 0.938009 vertex -5.32576 -4.95759 6.89409 vertex 7.15425 -0.422769 6.96188 vertex -5.3829 -4.57828 7.06725 facet normal 0.679084 0.550873 0.485163 facet normal 0.256282 0.844851 0.469623 vertex -8.71606 1.73373 5.07603 facet normal 0.630708 0.768445 0.108161 facet normal -3.934399e-001 6.745046e-001 6.246988e-001 facet normal -0.241804 0.796836 0.553699 facet normal -0.353578 -0.331809 0.874577 facet normal 0.471394 0.881923 0 vertex -1.21798 6.38487 19.9 facet normal 0.547907 -0.449653 0.705415 vertex 6.89148 -6.89148 3.26879 facet normal 0.747986 -0.192839 0.635083 facet normal -7.240739e-01 -4.112761e-04 6.897223e-01 facet normal -0.7054 0.06948 0.705395 facet normal 8.613212e-01 -5.080608e-01 0.000000e+00 vertex -9.176074e+01 9.441686e+01 1.855000e+01 vertex -1.038648e+02 1.020220e+02 3.455000e+01 facet normal -0.309855 0.748097 0.586806 facet normal 0.681162 0.725368 0.0992896 facet normal 0.0727061 -0.0568312 0.995733 vertex -5.00497 -5.09136 6.87866 facet normal -9.975486e-001 -4.442590e-003 6.983596e-002 vertex 4.041743e+000 -8.365688e-001 2.470218e+001 facet normal 0.0624786 0.0761302 0.995138 vertex 6.48017 4.32991 5.97318 facet normal 9.427791e-01 6.416468e-03 3.333562e-01 vertex -9.044135e+01 1.007803e+02 1.025032e+01.

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