I put alternative impact on my matryx. I bent one and it was a very minor bump to a rock. I ordered another and the next ride I bent it on the whooped out trail ride in! I think the break-away Heim joint is a gimmick. I went back to stock and it steers much easier then with the alt impact arms. When I pulled them off the heim joints had a ton of slop in them so they must be cheap. Plus his website doesn’t allow me to post a review!