It seems like it might be tricky to get camber properly adjusted with two upper links. Do you have a problem with it? Also, if you made the new upper link a little short would it give you more caster? Something I would want to avoid.
I've broken a lot of c hubs. But right now I seem to be spending most money on the rear uprights. It happens when I hit a pipe with my rear wheel and the wheel gets forced in from the top of it and than that forces the screw holding the camber link in place out of the plastic. I think this would be taken care of with the aluminum ones. But I haven't broken for about a week so I'm holding off on aluminum ones until I break the 3 uprights I have for replacements.