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2.286mm SIPAK Horizontal RM 1.7mm MultiwattF-11 staggered type-2 TO-220-4 Horizontal RM 5.45mm TO-46-2, Pin2 at center of hole, with a more complex module, several variations on the circumference of the rail + a safety margin // margins from edges h_margin = hole_dist_side + thickness; right_rib_x = width_mm - thickness*2; 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); 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 -6.33566 7.50886 facet normal -0.0497529 -0.0861751 -0.995037 vertex 0.627597 9.97537 0.0490595 facet normal 0 -0.994933 0.100537 facet normal -0.0980166 0.995185 5.85143e-06 facet normal -9.777731e-001 -4.355087e-003 2.096208e-001 facet normal -9.777786e-001 -4.353408e-003 2.095953e-001 facet normal 0.533422 -0.0645475 0.843383 facet normal 0.962633 -0.191482 -0.191502 facet normal -0.950506 -0.290244 0.110892 facet normal 6.126763e-01 3.910437e-03 7.903243e-01 vertex -1.054439e+02 9.725134e+01 1.131388e+01 facet normal 1.881520e-15 -5.428596e-15.

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