Im going to order a isspro fuel pressure guage so i can keep an eye on my lift pump. Problem is isspro only makes a 0-30 PSI guage and i really dont need anything that big running the kennedy setup. I was wondering since im going to run a mechanical guage anyways with the Diesel manor isolator if i could run a 0-15 PSI boost guage instead? Isspro makes one and im guessing pressure is pressure.