I have just installed a regulated return system on my engine. I found a few leaks and tightened them up. I am wondering the trend in pressure should be after the 20 second or so fuel pump run when I cycle the key to Run. Obviously ... it won't go up. When the pump stops running pressure immediately drops from 65# to 60#. Assuming no leaks, should pressure hold indefinitely or is it designed to slowly bleed off? The fuel system set-up has a back-pressure regulator (Aeromotive) in the return line to the tank.