wanted to buy a good fuel pressure tester. local part store rentals don't have quick disconnect adapters. looked thru ebay and amazon, afraid of cheap ones leaking. my current thought is to get the gauge from harbor freight (with schrader port), and an adapter by lang Tools 74492... not 100% sure it will work. the 74492 adapter is online only and shipping is half of the part price... I can't find good source for quick disconnect fittings and schrader on a tee even if I want to build one by myself... what do you use for fuel pressure test? any recommendations? thanks. cars have 5/16 in quick disconnect fuel pipe.