X-ends for holding 20x20 extrusion nuts/lm8uus

As seen here:
youtube.com/watch?v=7Cn1s9_PII0

These ends use LM8uus.

These x-ends are compatible with a simple Z-Nut or dual Z-nut with spring pair - should fit M8 or similar, I'm using it on acme 1/4" rods in the video.

These x-ends don't hold x-rods, they hold a single 20x20 extrusion.

both ends have an integrated bolt holder meant to interface with a z-endstop held in the lower part from thingiverse.com/thing:28425

By the way these are intended for 605zz idler bearings, you'll have to enlarge the hole either before or after printing if you intend to use 608zzs.