Daniel, You are right about the land trial. I tried it to day, but found myself lifting in impossible positions my 100 kg.
Ended up using a strong painkiller because my shoulders protested immmediatly.
The getting-out-of-the-pool method you described, is ofcourse the most logical method, but I don't manage that anymore.
Smith, you are right about the lack of headway when unsheeting completly. I do this always before uprighting. Also to prevent the unwanted roll-over to the next site when the boat has come up and tends to heel furher.
The method you described though, is abacadabra for me. I couldn't visualize it.