Could some one help me. I am thinking about buying a Uwatec MAster Diver SPG from extreme exposure in the USA. However i have no idea if this shop is reliable or not. HAs anyone shopped at extreme exposure? If so i would be grateful for any comments on this store. Oh and one other thing, My TX100 has 7/16 UNF ports (dont know what UNF means) will an american fitted hose fit my TX100 first stage? I wonder if i should get psi or BAR! All of your responses are very welcome and i am looking forward to your replies. Cheers