I chatted with Scott Gunter who installed some 600+lb units at the Karuna project. He made the point that these tall heavy units are extremely unruly and you would want as many hands and cups on it as possible to lift and stabilize it safely. At Karuna the beasty units were all
lifted into place on straps slung around Gradall forks.
As for the 75 lb rating on the 8" cups I would say they must have a safety factor built in, because they seem to hold waaaaay more than that.
Also I'm assuming you have taken the operable door off right?
Skylar
--
Sent from my phone