In reply to cb_6:
I know nothing about them beyond that they are heavy and have a handle! It's the sort of thing that does wind it's way to the car boot sale so I'll keep my eye out for one for a play.
I feel like I've got a decent home gym really, I have the sit up thingy on the bottom of the door, a pull up bar bought for 50p, a balance thingy and powerballs. And of course the huge thug rower.
I just half fancy a machine change and the more it couples up to help build to climb the better.