ok slowly getting all my stuff together to do the parallel fuel mod. got my FPR (sx-6) and a walbro. quick question what psi should i set the fpr at? i didnt get a model that i could hook up a guage straight to it. i was wanting to get on to run on the inside. the ones that are water filled or something like that. is their another way of check the psi without the gauge? whats the stock psi set at? the fpr will do from 35 to 90 PSI.