ive checked milleniums plating work with bore gauges and didnt really find anything to complain about but ill never have them weld anything again after they botched my last cylinder though. ill be doing my own chamfering as well. from what ive seen in the past they put a huge chamfer on the windows which is fine for most people but thats not how i want mine. so basically only thing ill use millenium for is to apply the plating and ill do all the rest