Vcore4 motor mount screw guide/retainer

Vcore 4 is using long screws as the shafts for the belt bearings near the motors. During installation and maintenance these screws are held in place by friction on the screw head, i.e. the counterbore is tight. This is somewhat sensitive to printer settings, and while the right side of my printer was nice and snug, the left felt rather loose. Also, it was a bit challenging at times to find the screw head with the hex key. I made these retainers to ensure that the screws cannot accidentally fall off, while still allowing access with a hex key. With these it is also a bit easier to place the hex key just by touch.

With this set up, I find it relatively easy to re-route the belts without needing to use zip-ties or similar. I can disassemble the top plates (even the hybrid), and re-route without the plates, and not be concerned about dropping the screws.

You need an M6x12 and a T-nut for fixing to the frame.

Not the prettiest looking thingies, but seem to do the job.