Stock CEN parts are not low quality. Of course they do not have the same quality as the hop up parts, but they do they're job. I think that you're stripped knuckle is kind of a bummer, but if you upgrade to the CNC ones now, you will definitely thank yourself. You get the added durablility of the CNC alum. and more steering because they're shaved at the factory. You have to kind of bear with some minor problems because CEN is a relatively new company and truggy. There's bound to be some issues that can be worked out. Most problems have already been solved, and CEN is working on the one's still remaining. This is partly the reason why CEN is coming out with a new gen. of Matrixes that have most, if not all of the kinks worked out. Even with a different truck, there are still going to be parts failing here and there from wear, or crashes, or poor craftsmanship. All cars have some kind of problems with them, and not many companies try as hard as CEN to solve them. Don't back down from the company you're with just because of a few problems.
Good luck with your truggy.
Tom