Pay no attention to the cockpit lump in the photo ... focus on the rail seats. As mentioned you can see the three levels of seating available now, the lowest - the original L/R seats, middle ground - the helmsman hump, and higher ground - the new rail seats.

You can see the support leg resting on the cockpit coaming. The support legs were cut from a third cutting board.

Stern Rail Seats

Heres another view of the port rail seat, showing how it attaches to the lower rail and is supported in the front by the leg resting on the cockpit coaming.

A Different View