I think TOGA's are the answer at this stage.
I thought for about 24 hours that this might be something doable, but one pass through this thread makes it clear why not.
I'm attending the next Gold Country TOGA in September. Handcranks in tow. I will be doing our Victorian Sweatshop show at the Willits Kinetic Carnival the weekend before that with all of the treadles and just will not have the umph to move them all again...