I have designed and gotten to work a few times a stow-able winch platform for a Gin Pole.
The platform should fit in the lazerette or the locker beneath the starboard couch in a Nimble 26
The archive is here Git hub of my Ginpole (https://github.com/tbodine88/NimbleGinPole)
(https://raw.githubusercontent.com/tbodine88/NimbleGinPole/main/0078-002GinPoleStowableWinchPlatform.JPG)
Enjoy.