I'm looking to 3D print a couple different style cups for Grados. I have a friend who completed his 3D printer a few weeks ago and if they're is enough interest, I'll be getting one too. I'm most interested in Full Wood Bodied and Full Metal Bodied Grados. Once we can get our tolerances in check I may have some for people to test out. He has printed an SR-X0i cup for the test run and it fits well and sounds as good as stock. I used the following model (found on Head-Fi) with a few changes:and here is the cup: