Just wondering what the difference is between the older cylinders (Fuji) and the newer ones (Robin) on the 400L's. I have been told the newer ones have some boost ports in them. My main question is if I were to ship one of both off to be ported how much of a difference would there be between them, if any. If I ordered a ported jug and then shipped back the Fuji cylinder would they reject it and charge me the core charge basically?

 

Some of the earlier 96 cylinders didnt have the boost ports,but after that they all had the boost ports.You definitely want to port a cylinder with the boost ports.I'm not sure if they would take a cylinder without as an exchange.So pretty much early 96,95,94 and so on didnt have the boost ports.