I cut this out of scrap plywood years ago, just to see if it would work. If it did, I planned to build one out of some better material.
That was 5 or 6 years ago,...
I never finished it or anything and it works slick. Just two separate pieces; plywood cut outs slide over binnacle guard - leg fits inside a cleat on the bottom.
Takes up almost no space in a locker and assembles faster than you can describe it. We throw a table cloth over it these days(it's had so much use it's pretty stained). Never collapsed.
Probably sell it with the boat one day. Wanna see my swim ladder?