For me it fits perfectly but It's a tight fit (like the original rail cover/adapter by ehdrien) and I can imagine that by printer tolerances and depending on the filament used, it could be a bit too tight for one or the other.
You could simlply scale x and y slightly (0,1-0,2mm) if it's too tight for you.
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The file is already pre-oriented.
It only needs approx. 4g of filament.
My print settings for PLA:
0,2mm layer height
3-4 walls
7 top and bottom shell layers
15-20% gyroid or cubic infill
(print with outer brim if you have poor bed adhesion)
Thanks to ehdrien for the file I could use for this remix.
The author remixed this model.