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Hello, I have modified the Armadillo headphone cup to fit what I want and need and now it is almost complete. What is missing is for the driver mount diamater to be exactly 40.3mm but I do not know how to do this at all and I am not an expert on 3d designing but I am pretty much a newbie. I have printed the cups out before and my 40.3mm driver does not fit although the cup mount was designed for "40mm" but mine is exactly 40.3mm. Picture to show what I am talking about blue has part of the mount marked in blue and file is here too >https://www.mediafire.com/file/m27pvwpfn5yc1m3/Fixed_cup_thing.stl/file<