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Stuff right_rib_thickness = 2; hole_radius = hole_diameter / 2; standoff_radius = hole_radius * 2.5; standoff_height = 3; 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 8.33435 5.74921 facet normal -1.90074e-06 -0.995049 0.0993842 facet normal -0.305317 -0.0393762 0.951436 facet normal -5.477276e-002 9.390116e-002 9.940737e-001 facet normal 0.194991 -0.980805 9.10797e-06 vertex -0.97495 3.23107 6.59 facet normal -0.884724 0.268377 0.381099 facet normal 0.290276 -0.956943 0 vertex 3.16504 1.30691 6.59 vertex -6 0 6.59 facet normal -8.599747e-001 -4.052572e-003 5.103206e-001 vertex 4.080477e+000 2.337180e+000 2.484593e+001 facet normal 0.479374 -0.871983 0.099229 facet normal 0.388731 0.815358 0.429045 vertex -6.7913 0.858226 7.56202 facet normal -0.734381 -0.392549 0.553705 facet normal 8.388524e-02 9.964754e-01 2.512607e-06 facet normal 0.0817064 0.0814906 0.993319 vertex 4.58792 4.29176 7.81747 facet normal -0.468344 0.782842 0.40965 facet normal 0.630625 0.768509 0.108196 facet normal -0.76848 0.630656 0.108218 facet normal -0.876739 0.468635 0.108209 vertex 1.87874 5.48554 21.335 vertex -3.23494 -4.84143 21.335 facet normal 0.439084 -0.687856 0.577979 facet normal -0.156321 0.0122986 0.98763 vertex 4.28602 0.223703 18.7299 vertex 3.65297 0 18.8084 vertex 4.47758 0.23878 18.7299 facet normal -4.575367e-001 7.823349e-001 4.226254e-001 vertex 4.345719e+000 -3.381239e+000 2.480400e+001 facet normal 0.938727 0.284751 0.194185 vertex 9.99456 -1.98804 2.19603 vertex -10.1521 -0.388301 2.19603 facet normal -0.0980166 0.995185 5.85143e-06 facet normal 0.946346 0.307482 0.0994132 facet normal -0.081813 0.0823699 0.993238 vertex -5.59382 4.18518 7.89166 facet normal -0.124395 -0.48503 0.865605 facet normal 0.772937 -0.634483 0 facet normal 0.125632 -0.98709 0.0993499 vertex 1.87381 9.82287 0 facet normal 0.665684 -0.586535 0.461347 vertex 6.63594 -0.72986 7.5439 vertex -4.27288 -5.22414 7.35649 facet normal 0.4714 -0.88192 -2.43656e-06 facet normal 6.013035e-01 7.990206e-01 3.429106e-04 vertex -9.322219e+01 1.047675e+02 1.055000e+01 vertex.

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