Fabricated some covers from .016" on my bender to cover the spar uprights. Added 6 mm layer of foam and glued the fabric in place.
Fabricated and installed some brackets to secure the bottom of the backrests into position so that they cannot slip out when the top of the backrest is leant on.
bent on my bender in the background
glued up and ready to install
These covers are a slip fit so that they can be removed for cleaning