I have overauled countless bbs in my lifetime. The fixed side tightens nice and snug against the bb face. THe adjustable cup threads in all the way and when it is threded in all the way, the spindle still does not want to tighten. I am nearly certain I am using the correct size bearing, but I cannot remember off the top of my head what size they are. They are brand new but I will check size comparison with the old ones. I am stumped here for some reason. Thanks for all the help though. I feel like it has something to do with the facing of the shell, but most of me wants to think that it wouldn't really matter.