I don't know what you are talking about, you ran the factory team aluminum hubs? I run them on both my t4.1 and sc10. They have zero slop on the hinge pin and bearings, so where is this slop you complain about?

Exotek products are very nice, I have several items from them and they were all perfect except one carbon piece that was cut slightly off. Hot racing and racers edge also have good quality aluminum parts. Just stay away from the integy ones, the almuinum is soft and they wear out fast.