Inspired by this Thing - https://www.thingiverse.com/thing:2635573 - this is a redesign to accommodate more readily available (in the US) 1/4-20 threaded rod (vs. the 5mm rod in the original).

Also, the two required nuts are printed-in-place. I'm using the latest PrusaSlicer which has a convenient "change filament at layer X" feature, and I force a filament change command just prior to the closing of the roof over the nut pocket.

Hardware Required: • 1/4-20 nut (2 per set) • 1/4-20 threaded rod, size to fit application