hi there.if anyone could please verify that i have got the right FE please.i have a JBL u401 reg and have got the U_M adapter.i got a 2kilo co2 FE, the adapter fits ok.the FE has a working pressure of 174 bar and a test pressure of 250bar.will my reg be ok on this fe.? any help would be great. thanks ,skankypup.