An adaptor to convert a 92mm fan opening/mount to use a 80mm fan. All the adaptors i found on thingiverse were to thick to fit in the space i needed.
This is designed to be used with the standard fan screws(the ones with the really coarse thread). They Should bite into the outer holes(92mm) but should be loose in the inner ones
V1 has a smaller inner size(size of the blades) and V2 was made to match the size of the opening on the actual fan I was using. I recommend using V2
I increased the wall thickness a bit to try and strengthen the screw holes a bit, not sure if it was necessary.