Needed a knob for the RS26 4P3T w/ 20mm handle but didn't find one that suited my use so I designed one. Includes a hole for a M2 screw at the 3-o'clock position. I include 2 files with different depths for the screw so you can use it with different screw lengths.

• If your handle is plastic, drill a small hole on the handle so the screw attaches properly or use glue.
• At 0.2mm, add a pause at layer 66 to change color to get the effect shown in the pictures.