I'm using my old Peugeot 10 speed as a trainer. The saddle height is adjusted via a bolt and nut through what is essentially the back end of the top tube that encloses the seat post. Since my wife and I both want to use the trainer, I'd like to come up with a quick release/easy way for us to release/lock the seat post instead of having to use a pliers each time.
Any suggestions are welcome. I've attached a pix of the current arrangment.