Hi Cyclerama. Welcome aboard. I took your post in the 'Seat Guides' thread and started a new one. That post was old and this was a bit of a hijack. I reworded your post slightly as the old post was referring to previous posts and would have been confusing in a new thread. Hopefully someone with a similar model can help out.
I hav a 2800, however the helm seat slides and I have a front to back setup that does fold out. Mine front to back has 2 black handles that spin (standard setup righty tighty/lefty loosey). My helm seat has a lever on the underside on the left front. Not sure about yours. I would try to stick my head down there or even take a pic. Best of luck.