Reverse Bowden End Cap

I have a Prusa Mk3 and printed off this amazing reverse bowden setup where the end point mounts to the upper right of the frame: https://www.thingiverse.com/thing:2825557 I had some old M10 tube fittings laying around so I used one of those, but it only kept the PTFE tubing from pulling back out. So when I would remove the filament, the tube would come through with it and I'd have to adjust it all again.

So I quickly threw together this simple end cap piece that screws in from underneath