I use the same anodisers that vanguard use. When we do nt's the problems we find are the ally grubs in the body leak. Use lock tight to seal. Other than that the ul airports are a bitch to put back together if you strip them down. We've done 4 nt's here at pb religion and they all work fine. Just don't lose shims from the reg if you want to strip it completly down or put them on the wrong way. Any other questions ill be more than happy to answer.