Re: Toying with an idea (stern perch seats)
Make yourself a one leg milking stool such as pictured below with a rubber tipped "toe" and nice padded seat and a lanyard to keep the thing from going adrift when it's not needed. You can position it wherever convenient. BTDT
Just make sure you keep it right side up when sitting.
1977 C&C 30 Mk 1 hailing from Port Clinton, Ohio