About this 3D model
This is a Knob for the Z-lead screw, following the design of the extruder knob found on the Ender 3 V2. The diameter for the hole was 8 mm. The final outcome was a pretty tight fit for the Ender 3 V2 lead screw. I printed with the top on the build plate, which needed less supports at the expense of the finish. Supports will need to be pried off with needle-nose pliers. Printing time is approx. 2 hours.