"GeneT" wrote in message
Hmmmm, fan powered-I might be able to make that work!!!

Too much hassle ensuring the power cord doesn't get hung up. If it were my
setup, I'd consider putting in some form of guide rails so the sled slides
straight up and down. Anyway you look at it, someone is going to have to be
at the top and bottom to load and unload. Might as well have one of those
people also handling the pulling/lowering rope.