I have the same boat, am 5-10 and 190#. I used a "creature comfort" seat in my Cape Charles. As it is velcro'd to the floor I can adjust the backrest by simply pulling the seat up and moving it. The back rest rests against the coaming. I find that I only use the back rest when relaxing. I tend to lean forward a little when paddling, especially paddling hard.

> I had the same problem with CLC's design for the Cape Charles.
> I am 6'2", and have to sit all the way to the back of the cockpit.
> The plywood backrest called for in the plans, did not curve enough
> to allow me to do this unless I wore so low that it didn't help at
> all. What I ended up using was a large piece of leather in place of
> the ply. To me, this is a whole lot more comfortable, because it's
> soft, and at the same time gives good support. Just hook it to your
> straps in place of the plywood, and your good to go.