This is the Prusa Steel Sheet Holder, 3er, modified for Gridfinity! Holds three sheets, and occupies 1x7 blocks.
Can optionally be affixed with magnets, screws, clickfinity, or just by gravity.
The hex base is no longer necessary and is removed to save on filament and print dimensions.
Instructions:
Note: the piece and Gridfinity base are positioned so that it can hold MK4 sized sheets perfectly. It should be able to hold Mini or XL sized sheets by moving the pieces closer together or further apart on the grid, but the fit won't be perfect.
The author remixed this model.
Compared to the original model:
I used the other Gridfinity model only for inspiration. Compared with that one: