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Clearance If desired, copy the files from the centerline of the rail + a safety margin // margins from edges v_margin = hole_dist_top*2; width_mm = hp_mm(h); 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 -4.6286 21.7443 facet normal -0.129422 -0.645449 0.752759 facet normal -3.395570e-15 -2.311854e-15 1.000000e+00 facet normal 0.995186 -0.0980045 0 vertex -1.75581 8.82707 4.51215 facet normal 0.0868544 -0.0464246 0.995139 vertex -2.87789 -6.94785 6.0001 facet normal 9.369221e-001 3.100829e-003 3.495245e-001 vertex 4.042035e+000 1.627162e+000 2.475471e+001 facet normal -4.328589e-001 -7.575032e-001 4.886943e-001 facet normal -0.0073974 -0.0989687 0.995063 vertex -0.50268 7.98986 19.9434 facet normal 0.29048 -0.0342449 0.956268 vertex 5.16004 -4.76054 6.94563 vertex 0.119821 7.15688 6.88072 facet normal 5.035336e-001 2.241906e-003 8.639727e-001 vertex 4.162750e+000 -8.360300e-001 2.491820e+001 facet normal -0.77078 -0.0759133 0.632562 vertex -1.70669 8.58011 5.33536 facet normal 0.694966 -0.464389 -0.548968 vertex -3.08346 -1.31835 18.4724 vertex 0.4 3.34544 16.275 facet normal -0.262751 -0.491602 0.830234 facet normal 4.829391e-002 8.571911e-002 9.951482e-001 vertex -5.299474e+000 -3.144912e+000 2.496000e+001 facet normal -0.0645513 0.533418 0.843385 facet normal 9.835916e-001 1.804095e-001 -0.000000e+000 vertex 4.695738e+000.

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