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Is there a way to decrease the distance between the idler and the drive gear? When I printed this, there is too much space and the filament slips. Below are the values I used for the drive gear:

// drive gear
drive_gear_outer_radius = 12.00 / 2;
drive_gear_hobbed_radius = 10.35 / 2;
drive_gear_hobbed_offset = 2;
drive_gear_length = 13 + 0;
drive_gear_tooth_depth = .2;