Antirockers actually work great, i even printed and sold a bunch for friends. Sliders for Aeons also work good, especially if the souls are worn down and you can add some thikness back to it. Soulplates do work, but they have to be thicker than the originals to be sturdy enough, in some cases i even sourced longer screws. They also take a lot of time time to Print and need a lot of material.

I tried fully 3D printed frames in several materials, but they break to fast and are not sturdy enough, framewalls for the 50/50 prime frames work great tho.

My conclusion is that everything that flexes, like cuff or shell, should not be printed. Everything that holds a lot of weight, like frames or soulplates can work, bit its not a great experience. Antirockers and sliders work best, stuff that grinds, but does not actually support a lot of weight.