2025-04-10:  Have updated the models to have the MultiConnect slots which are generated by @BlackjackDuck 's openSCAD generator.  Printed both versions, pictures, STL, STEP, and the print profile have been updated.

I remixed the original model to make 2 versions, both using flush mount MultiConnects, but one for Multiboard's 25mm spacing and one for openGrid's 28mm spacing.

I have also remixed the gear to shave a small amount of the diameter as I found with my prints in PETG it was getting stuck in its track. I have uploaded the original gear as well just in case you don't have the same trouble as me.