Little late with this -
I'm currently starting a pair of Birders in my shop. One is for my wife to use for photography of birds and other wildlife for her paintings.
The other will be for me to use to fish from. I fish the back lakes and saltwater sloughs around the Texas coast, both with conventional tackle and fly rods.
I tried a Birder while we were at a sailing rendezvous in P'cola this spring. Very nice little boat. You can call Graham, the designer, for one to one discussions on any mods you'd like to make. He's quite available to any of his builders. Of course, the next several weeks he won't be cause he's heading down under for a while
I've built three of his designs so far- one for myself ( a dinghy for our sailboat) and two larger sailboats for customers. Will be starting a 20 footer for another customer as soon as I get our Birders "3 D" as we say.
At any rate- built to specs, the Birder should run under 40 pounds, be quite stable, as far as kayaks are concerned and easy to handle. I'm thinking of modifying the cockpit slightly for more gear storage aft of the seat. Not much-- just enough to fit something like a milk carton in there.