I've been seriously thinking of buying that lifter, maybe around mid year. Could I manage it by myself? No chance of toppling if you stand in front of it to slide the hive on?
Anyway, I have the dubious issue that the fellows want to make me one instead. But I'd need clear photos or plans for them to follow. If it's not too much trouble, could you possibly take a few photos of the mechanism and tray and maybe a few measurements?
A couple of them won't go near the bees, but I was at work the last few days and they can't sit still, they had to construct another hive stand and a few entrance closers. A project like that will at least keep them off the street for a couple of days.