On the Hotronix presses, for example a setting of 6 would roughly represent 60 PSI.PS - I saw the numberical guages 1-9 but didn't know of any way to calibrate to a specific pressure load. The air operated press I was looking at had an actual pressure guage that would make me more comfortable in properly specifying the pressure especially if I have others helping me. Mainly for consistancy. Though I guess thre might be some way to guage the pressure? Ideas anyone?