As I am building a 1 inch version and using metric fasteners I sometimes need to take a drill and ream the holes a tiny bit.
Must say that most of it is coming together with minimal reaming or sanding.
Also i am using ABS and that’s prone to warp or shrink and at a fast speed. (0.2mm accurate)
Printing with PLA could be better for the fitment.
Reply To: Pitfalls ahead – self printing my parts