Ender 3 PSU support

When assembling the Ender 3 the bottom bolt holding the PSU in place stripped metal on the PSU, so it wobbled a bit, though I'd probably still have made this anyway.

The shorter version is to work with this dual z axis modification: https://www.thingiverse.com/thing:2992795 (as requested by Arminth in comments)

If you are interested in making your Ender direct drive check out the Zesty Nimble Extruder that I co-created.
https://zesty.tech