One of the cushions I wasn't looking forward to re-doing was the front v-berth cushion, because the fabric was stapled onto a backing board. It had a SHIT TON of staples >_<... way more than I thought.
Won't be able to reuse the foam, it looked awful and was crumbling to dust. I will have to wait before making this cover.
Like the backrests, I found some Japanese writing on the backing board when I removed the foam: Y-33 クッションセンター2 (Yamaha 33, cushion center 2)
Completed one of the irregular-shaped cushions on the boat! Went well, but required a bit of concentration because none of the foam sides were the same (i put numbers on each piece of fabric, as well as 'this way up' arrows to not get confused).
I always panic when I first put the cover on, "SHIT! Doesn't FIT...!" Then I wrestle it into the cover for 20 minutes, it settles in, and looks great.