[ngreen]

Yep. F=PA. Double the cyclinders, double the area, double the force. Most people use the cyclinder as levers so know how much you want to lift and how far you want to move it. Then you can find where you need to place cyclinder(s), how many cyclinder, length of stoke, size of bore, the pressure you need to run at, etc. With pneumatics you only need to use what you need. Just figure how much you need to lift with respect to where you are lifting if from and you'll be fine.