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: Knurls-1] rotate([0, 0, i * (360/RingMarkings)] cube([RingWidth*.5, MarkingWidth, 2], center=true); cube([8, 3, KnobHeight], center=true); if (RingWidth>0 cylinder(r1=KnobMajorRadius + RingWidth, r2=KnobMinorRadius, h=RingThickness, $fn=50, center=true); if (RingWidth>0 cylinder(r1=KnobMajorRadius + RingWidth, r2=KnobMinorRadius, h=RingThickness, $fn=50, center=true); if (style == "nut"){ } module rail(height) { 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 -8.56166 5.56266 facet normal -0.15129 0.0100873 0.988438 facet normal -1.284286e-001 -2.247502e-001 9.659159e-001 facet normal 0.0502428 0.08702 0.994939 vertex -4.28928 -6.75883 19.9502 facet normal -2.890018e-001 4.954581e-001 8.191454e-001 facet normal -0.847857 0.479705 0.225879 vertex 5.7853 4.29641 7.81019 facet normal -2.979088e-001 -5.204982e-001 8.002075e-001 vertex -4.663306e-003 4.758252e+000 2.492316e+001 facet normal -4.792340e-001 -8.386592e-001 2.588158e-001 facet normal 9.988183e-01 1.425370e-03 -4.857871e-02 facet normal -2.205679e-01 -9.753716e-01 3.456729e-04 vertex -9.599322e+01 9.184444e+01 4.255000e+01 facet normal -0.555577 -0.831465 -1.98967e-06 facet normal 0.435817 -0.76572 0.473008 facet normal -4.407540e-001 7.529338e-001 4.886989e-001 vertex 3.489149e+000 -2.726548e+000 2.484855e+001 facet normal -0.0814637 -0.0815458 0.993335 vertex 4.28788 -4.58534.

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