I just had a machine shop take off about 20 thousands of an inch from one of my old flywheels so I could reuse it. Is that too much? I thought I heard that would be ok, but now someone told me that 5 or 10 thousands is the max. I'm not sure if I should use it or if I should buy a new flywheel. Normally I would get a new one, but I just replaced it a few weeks ago and it got ruined due to a faulty clutch install, so I'm not very eager to spend another $450.