Hello! I bought a compressor off of craigslist awhile back. Craftsman 5hp, single stage, 240 volt, 20 gallon 9.3 @ 90 psi. 11 @ 40. From the start, pressure would not go above 25. After I replaced the switch (it was beat up) I got into the manual. Turns out the factory set cut off is at 25 psi. It said that I would need to put a regulator on to adjust the pressure. After i connected a regulator, nothing has changed. Do I need to switch the regulator I just bought for the factory installed gauging device? If so, can I screw my electrical switch into the pressure gauge port on my regulator and throw in a gauge somewhere else? Or will I have to buy a new device? (My regulator has air intake, outtake and pressure gauge ports). Please reply with anything and everything that I could be doing wrong here!!!! Thanks a bunch.