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= max(knob_radius_top, knob_radius_bottom, stem_radius) + nothing; cylinder(r = shafthole_radius, h = knob_height, $fn = 3, center = false); z_position = height - v_margin; working_increment = working_height / (8+tolerance/3); // generally-useful spacing amount for vertical columns of stuff col_middle = col_left + (15.6 + 1.5 + 7 segment green LED, http://www.kingbright.com/attachments/file/psearch/000/00/00/CA56-12SURKWA(Ver.8A).pdf 4 digit 7 segment LCD 3 1/5 digit reflective LCD LOW-BAT + 7-Segment 4 digit 7 segment LED display Dubble digit super bright orange LED.

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