We always left the banana cushion in place which made the top bunk cushion come out at a nice comfortable angle.
But since we have abandoned the idea of ever actually using the top bunk we followed someones suggestion here and reversed the top and bottom cushions 86ing the banana cushion all together. The switch gives the person sleeping on the front bunk more room without falling in between the cushions at night and having the plywood bottom adds a little stability, plus the former bottom bunk cushion fits as a back cushion perfectly.
I wish we would have figured it out before we had the cushions redone, the only negative being now the zipper is in the front of the bottom cushion instead of hiding against the wall. I know I'm probably the only one who notices though.... Oh and we did remove all of the brackets on the bottom bunk and the supports for the top bunk, so it would lay flatter.
Sooo, banana cushion in garage---next to the now never used tent!