I just changed out the stock compressor wheel for a Billet Wheel from RiffRaff. I removed the turbo to do this, got everything back together put my boost Leak Detector on and now have a leak at bottom of the compresor housing. When I put the housing back on the turbo I was very carefull to make sure I went by the numbers. My question, are leaks common around the compressor housing? I'll pull it back off and see what I can do.