Shoulder Buttons

Left: Click on the image to open a 3D .pdf version of the design.
I'm using Hot Melt Inserts to provide a better grip than attempting to tap threads into a 3D printed plastic part.
Shoulder Buttons are sold in sets of 4 - see the Part List
3D Finished Parts Installed in Shoulder Horseshoe

Image kindly provided by R2 Builder David Codding