I do not have the center locked and do not plan to. I have read many times that with this conversion there is no problems at all. From what I see in the exploded diagram. The only parts needed for this conversion is ---shaft prt# gso4o, and brake shaft prt # gs039. I decided to do this when one of the tips broke off of my dogbone wearing a huge gash in the cup. Screwing up my brakes. The front has held up fine with no signs of wear...So explain to me why metal is better than plastic? Also correct me if im wrong about the parts needed. Thanks