[maxgebhardt]

but would the suction be strong enough to hold a crate, and would the cup hold? the boxes have lips, and it would really suck (no pun intended) if you set it up, but then, lets say, an upside down box would not line up properly. also with the issue of no compressor, I'd be concerned about air leakage from the time you leave the pits to the time you actually match, and if you only have limited air, you might not get the job done that the pneumatics would be intended for, with maybe only 5-6 times that you could use a pneumatic cylinder, and less if it was large.