Arca rail mounted 3" front bag rider

thingiverse

This is a 3" wide bag rider to sit in a front bench rest. It is a nice sliding fit onto an Arca rail and has a counterbore for a 4mm screw to retain it once it's slid on so there's no need for a clamp. I printed it standing on its end so there was no need for supports and gave it a light sand when it was done to smooth it out. The bag rider has a hollow underneath and 2 rails on the sides to slide on the bag.