has anyone seen one or thought about building one? The idea is to send trains up to the ceiling track from the table layout. the table layout "folds" up onto the wall when not in use. So, when you want to play train, pull the layout down off the wall (slides down and out) then lower this multi turn helix that is coiled up and attached to the ceiling track (via an 022) down onto the table layout. then send the train down - like those multi-level parking garages. humm. I have seen gunny's' double helix going from table to ceiling. thats what got me thinking. if I used several circles of track connected into a continuous spiral that could be compressed onto itself. then lowered (relaxed) down onto the table layout. -any thought?