I had a plate that didn't fit my GE microwave cog (White color).

The slim spindle (on left) by Usuariu probably would have worked if it was 4MM taller. However I took the opportunity to make the drive cogs bigger too.

This is for using with a plate having approximately 18mm hole in the center of the drive lugs.

Attaching to a GE Microwave that normally uses a WB39X10032 plate.

Work in progress. (I added another 2mm to the top and a 'bearing' surface to the bottom of the tri-flange; I may have the wrong wheels supporting my plate.)

I would print at 0.12mm layer height 4 walls and 60% infill

Flip it upside down in your slicer to print it standing on its "head"