We had major issues when we had ours changed in the wagon not knowing about this site at the time we went to our local servo hes dealt with wrxs before but the noise would drive us nuts (it got written off before we could investigate further ) im a bit lost with the lingo in previous posts from what i remember with ours something was warped..? though if your mechanic mate cant locate the prob then im assuming this isnt it as thats easily spotted.....? We were told to get them skimmed too but that made it worse