I have a 3960 first stage with a standard jetstream second. It has the opv in the hose... Now what I would like to do is get a hose adapter and put a 7' miflex hose on. Since the 3960 has an over pressure valve on the bottom do I have to put a screw in LP OPV in since I don't have one in the hose anymore, or will the one in the first stage do? Thanks!