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Round shafthole base shape. See knob_base(). Rotate([0, 0, 180] // Left side: meta-step controls // run/stop (switch // once/continuous (sw15 // 2 NO Moment switches: // 1 for run/stop (sw14) // 1 for run/stop (sw14 h_wall(h=4, l=slider_spacing*10-1, th=1); v_wall(h=4, l=height-rail_clearance*2-thickness, th=thickness*1.25); v_wall(h=4, l=height-rail_clearance*2, th=right_rib_thickness); // top right [left_edge + height * rotate_vector_cos; points = [ [left_edge, rotate_vector_cos * rail_depth], // top horizontal rib // one more to mount the circuit board to, dead center pcb_holder(h=10, l=top_row-rail_clearance*2, th=1.15, wall_thickness=1); // lower h-rib reinforcer ## Photos [to be added] ## Documentation: * [Schematic](Docs/precadsr.pdf) * PCB layout: make power connection traces larger; MK.

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