I designed a 52mm filter holder for GoPro HD3/3+. It is press fit over the lens.
This is version 4…1 was badly designed, 2nd was a corrected version, 3rd was a prerfected version and 4th is a lighter version.
What gets me is the dimensional precision these printers have. Did the model specify a 52mm opening, or did you need to adjust things to fit?
I have included some adjustments due to shrinking of pla. I don’t recall the exact numbers but I can have a look when I get by my computer. Of course mileage can vary from printer to printer.
Nice!, are you going to share the design?