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Sphere_indents_radius = 3; difference() { difference() { difference() { 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 -6.33566 7.50886 facet normal -0.118608 -0.286346 0.950757 facet normal 1.398071e-01 -9.901787e-01 3.531486e-04 facet normal 0.0943136 0.991505 0.0895749 facet normal 0.0727061 -0.0568312 0.995733 vertex -0.0206242 -7.34599 6.86125 vertex 0 10.1139 2.58057 vertex -9.41467 -3.89968 2.19603 facet normal -0.430898 -0.353597 0.830239 facet normal 0.499881 0.866094 5.82713e-05 facet normal -5.831059e-001 -8.123961e-001 0.000000e+000 vertex -2.772438e+000 4.890769e+000 9.983999e+000 vertex 1.380968e+000 -5.529187e+000 2.496000e+001 vertex 2.684762e+000 -5.028090e+000 1.747200e+001 facet normal -0.301701 0.851405 0.429052 facet normal 0.449653 0.547907 0.705415 facet normal -6.586109e-001 -4.311545e-003 7.524713e-001 vertex -4.118436e+000 -1.694147e+000 2.491820e+001 facet normal 0.382418 -0.0376647 0.923222 facet normal 1.907067e-13 -1.000000e+00 5.280385e-13 vertex -1.082883e+02 9.725134e+01 1.044712e+01 facet normal 0.0818475 0.0808324 0.993362 vertex 4.97321 4.12613 7.83559 facet normal 0.996728 0.0397752 -0.0703603 facet normal 0.279012 -0.084637 0.95655 facet normal 0.737729 -0.601759 0.30601 facet normal -0.0827209 -0.0808284 0.993289 facet normal 0.470887 -0.0463777 0.880973 facet normal 0.989338 -0.097471 0.108209 facet normal 0.749604 -0.288937 0.59549 facet normal 0.417286 -0.223044 0.880979 facet normal 0.0821247 0.0559923 -0.995048 vertex 8.08467 -5.87688 0.0486652 facet normal -0.308981 0.0243251 0.950757 facet normal 9.349033e-001 -3.549024e-001 0.000000e+000 vertex -5.008282e+000 -2.640207e+000 2.496000e+001 vertex 6.657893e+000 2.413067e+000 9.983999e+000 vertex -6.709746e+000 2.137466e+000 9.983999e+000 vertex -5.640343e+000 -2.215887e-001 9.983999e+000 vertex -6.461357e+000 2.791791e+000 1.747200e+001 facet normal 8.707612e-01 -1.569950e-03 4.917037e-01 vertex -1.092228e+02 9.665134e+01 9.866685e+00 facet normal 0.00125241 -0.115499 0.993307 facet normal -4.866832e-001 8.343568e-001 2.588207e-001 facet normal 3.439834e-15 -5.206436e-15 1.000000e+00 facet normal -0.000209061 -0.115803 0.993272 facet normal -9.901917e-001 1.397156e-001 0.000000e+000 vertex -1.739018e+000 -6.897197e+000 9.983999e+000 vertex 4.148033e+000 5.705007e+000 1.747200e+001 facet normal -0.115312 0.00018283 0.993329 vertex -6.33956 -0.410784 7.82455 vertex 4.77144 4.18796 7.82405 facet normal -0.15247 -0.036616 0.98763 vertex 5.13783 -0.11686 18.8084 facet normal 0.575169 0.528289 0.624573 facet normal -0.0369052 0.124337 0.991554 facet normal -0.243634 0.188037 0.951465 facet normal -2.971779e-001 -5.209042e-001 8.002150e-001 facet normal -4.496521e-001 -7.868910e-001 4.226293e-001 facet normal 4.136177e-01 -2.108080e-03 -9.104482e-01 vertex -1.084728e+02 9.695134e+01 1.262749e+01 facet normal 0.952732 -0.286108.

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