There are 2 versions:
Wide and normal sizes.
Bend the base a little to get the rollers on.
2. Version: Uses M5 hex screws
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Update 9th Nov 2023
Some of you reported the rollers not being strong enough and friction too high.
I added another version which has the base in 3 parts.
This Version2 also requires 12 M5x15 mm hex screws.
VER2.ZIP files contains 3mf, and stl files.