Voron SlideSwipe Probe Remixed Mount

This is a remix of the frame mount (RailMountSide.stl) for the SlideSwipe probe for Voron v0.x printers by chestwood96.

The original uses a snap-in approach to hold the SlideSwipe mount on the 1515 extrusion. 

This remix uses two M3 nuts (or two drop-in M3 t-nuts) in the 1515 extrusion for a more rigid mount.

I also made some minor changes to the mount to increase the tolerances to allow a wider range of MG-90s style motors to be used.