[greywuuf]

I cant answer that as i am not familiar with a "roll off" the hook lift is the only system I know that is self loading. (unless a roll off is not also a dump bed? because a hook lift is )

Fixit-p hmm I can see that point, it looks like a pretty "poor" mechanical advantage but I still say a bigger cylinder would do it at lower pressures. the disadvantage is a bigger Cylinder requires more volume and thus more time... an issue in a Working scenario, not so much if it is only used to change out the beds say once a month or something.