Nothing prevents the seatback from resting against the bulkhead, and my seat cover already has a little tear in it where it touches back there, from just the very few times I've sat in it with the cover on. I made and installed some legs which it can rest against instead.
You'll need: 4 - NYLON TUBE CON. 1X.049 MAXTC-1, Part #: 05-02097 1 - 2024T3 ALUM. TUBING 1X.049 1FT, Part #: 03-34200-1 4 - 2" stainless bolts, nuts from the hardware store 4 - 1" chair leg protectors from the hardware store