Per Dualcan on VinylEngine: "These parts are printed in steel therefore are unbreakable!"
When a customer has a turntable with broken ears, I ask if he/she will ever stack records. If the answer is 'no', I offer a more economical fix than replacement of the dearing ring.
A bunch of thin spacers to lock the arm at the right height for single play work just fine.
What does it mean that the parts are printed in steel? Do they make computer printers that spit-out molten steel?
Why don't you do a little reading.
http://www.sciencemag.org/news/2017/10/3d-printing-doubles-strength-stainless-steel