The bearing sound could be your tyres flat spotting due to bad geo, they turn into 50ps and drone.
Yeah, I've suggested knocking a full degree out, but 1/2 minimum. More rear camber is safer, as it gives the rear more lateral grip and ensures understeer is your first point of call... this however makes for a very boring car. Early GTIs had no rear grip, which is why the press loved them and you see loads of shots of them in massive lift-off oversteer slides. They soon changed it when the fecking 'we'll sue for anything' Yanks started sticking them on their roof.