I upgraded to Powerslot front rotors about 70k ago and they had a vibration since day 1. Its grown worse and couldn't stand it any more. I replaced them myself last weekend (with another set of powerslots - from Tire Rack). Used another set of the factory pads - love them as they are dust-free. The job went fine except after putting the caliper on and spinning the rotor (no pads) I could see that it had a serious wobble in it. I took a sledge and a block of wood and "applied vigorous pressure" around the hub and that made a big difference. Bled the system (replaced all fluid) and initial results are good.

Wondering if the guys who did the job last time simply didn't have the rotor on all the way - aaargh!

They probably left some crap in there...
always make sure to clean off the mating surface really well...
i hate lazy mechanics...

Yeah, that sounds like more than just normal warping of the rotor.

When you get sick of warped rotors and want to really resolve the problem, you should swap to the thicker Tundra rotors and calipers. I've had no warping at all with my Tundra brakes, despite a period of time where I basically only had front brakes due to leaky rear axle seals that soaked my rear brake drums with gear lube. My previous post about the Tundra brakes is at:
http://www.4x4wire.com/forums/showf...1162935&Main=1162763#Post1162935