Jag rear end vented brakes upgrade problem

[Akimbeau]

Since I had the rear end apart, I thought I'd up-grade the rear brakes to vented rotors, try to reduce the heat at the stub axles. The kit I purchased incorporates a 2 piece rotor...a vented rotor from Wilwood and a 1/2" steel hat that adapts it to the stub axle. With some minor spacer tweeks and a small bit of grinding on the calipers the kit seemed to be coming together. The surprise came when I found that one of the hats was severely warped..almost 1/16" across its surface. The other hat seemed fine. I called the company that sold it to me and they are sending out a new hat. In the mean time, I put a dial indicator on the "good" hat and rotor and found that it's run-out in relation to the diff was .014. I tested the stock rotor I removed and it had a run-out of only .003. What is your opinion on the higher run-out of the vented kit? Is it more forgivable because it is a 2 piece rotor, having more flex? I'd hate to get the rear together and back in to find that I get pedal vibration or some other problem from the higher run-out. I get the other hat tomorrow and will mock that one up as well and see what run-out it has.

Kim