This is a modification for the mk2 full bear frame which adds mgn12c linear rails for Y axis. Files shared here are printed parts to put the bed at the correct height.
Please note that you will need 6 pcs of low profile countersunk m3 screws for fastening the spacers properly. But it might work good without them too.
The Prusa Y carriage holes are perfectly drilled for the mgn12c blocks.
I used 311 mm long custom cut 2020 aluminium extrusions to mount the rails on with m3*8 screws and m3 tee nuts, similar to the ones used by Bear mod.
Some old rope ABS or PC