super late reply but if anyone else passes through you should check out the weaponsguild forums, they have a dedicated MG42/M53/MG3 board with builders who have done quite a few of these.
https://weaponsguild.com/forum/index.php?board=25.0
Hello, I'm born and raised in Lafayette. I primarily do AK builds at this time. though I have made custom parts for other guns as well as custom modeled 3d printed gun parts, you can check out my 3d models here (https://grabcad.com/homethearmless-1). I have a lot of experience with 3d printing...