And the couch bed now fits tight against said wall, with a post on the other end of it.
In fact, it's so well fit between the two that the frame of the couch bed had to be lifted up tilted because it is wideer than said opening. But the bottom slide-out part is just... and I mean juuust small enough that it almost rubs the post when rolled out and lifted up.
Damn I'm good though. Especcally at getting the most out of small spaces and/or cramming big things in small spaces, combined with interior decorating.