Hinged buffer assembly and loading fork for Prusa core one

I didn't like how the buffer held on (barely) to the printer, doesn't work with the loading fork, or was in the way when printing without the MMU. After trying other solutions without satisfaction, here's my attempt to fix all 3!

• More stable attachment to the core one.
• Swings out of the way when loading without the MMU (added magnets to the top spacer to keep it closed)
• Made compatible with the loading fork (with modified handle) with numbered inputs.

Requires 3x M3 screws/nuts, Magnets optional.

NOTES:

I made a version of the plate separator to use the same magnets that are used for gridfinity bins. Also uploaded a blank one should you want to use different magnet sizes and create a hole for them in prusa slicer.

Also added a tool to help hold the M3 nuts while attaching the printer hinge mount.

Should work on the left side of the printer (not tested).

Print settings: PLA, 15%infill, 3 perimeters, supports for “buffer hinge mount” only. 

• MMU buffer assembly modified for a hinge and loading fork support for the core one.
   
• Loading fork handle modified to work with the modified core one buffer.