Feet for Y-axis mod (MK3 style) for MK2/2.5/S with belt tensioner

I upgraded my Prusa MK2 all the way up to the MK2.5S and used the wonderful Y Axis Mod to significantly stiffen the frame.  

https://www.printables.com/model/135834-prusa-i3-mk2s-mk25-y-axis-upgrade

https://www.printables.com/model/445946-y-axis-mod-mk3-style-for-mk225s-with-belt-tensione

I also tried the squash ball feet for the Y Axis Mod, but after 6 months the squash balls became flat and it sagged down at the back due to the extra weight and kept falling out.   In short great idea in theory, but squash ball feet don't work well in practice.

https://www.printables.com/model/455171-low-profile-squash-ball-vibration-dampener-feet-fo

I still wanted some vertical lift so that the routed cables were not squashed against the frame, so I devised these feet to replace the squash ball mounts.  They fit directly in the existing feet.  I added some rubber at the bottom for a little more grip.  These sit in place and work well.

You need to print two LHS and two RHS ones.

SCAD file included so you can modify / enhance if you need.