Ahoy!

I'm building a PMD from plans.

I'd like to use the front watertight compartment to hold a tent & campstove, maybe two sleeping bags.

 Not sure the standard 6" round flush hatch is big enough to get them in.

Anyone ever tried putting a Shearwater kayak-style flush hatch on a seat?

My concerns are watertight integrity and load-bearing ability (although I'd probably put the hatch far enough forward that only the dog will be sitting on it).

 Thanks!