> A feature found on some kayaks is the ability to rapidly jetison the sail
> and mast. Theoretically, then, if the boat tips it is easier to right the
> craft. After that the sail is remounted and the trip continues. In my
> limited sailing experience I have never tipped, so I have no personal
> experience with this and would enjoy hearing from anyone who has.

This is usefull as a sea anchor, to slow the boat down in a storm, you just through the whole rig overboard with the lines still attached.

> What I would do is this: Build the hull first, glass it, Cut the slot for
> the centerboard well, cut the pieces for the centerboard well from plywood
> and assemble three sides, leaving one wide side off. I would measure so
> that the well is 1/8 to 1/4 inch higher than it should be to fit the deck.
> I would glass the inside of the centerboard well when I installed it, and
> leave a bit of extra glass at the bottom, which I would bring through the
> slot in the hull and epoxy to the outside bottom of the hull. It would
> probably be a bit messy to work with this. but I can't see how I would do
> a good job of waterproofing that area otherwise. Once the resin had set
> I'd plane or belt sand the excess height to fit the curve of the deck.
> After installing the deck I'd go around the joint with a few glass scraps
> or tape and resin. Of course with a long cockpit I wouldn't need to worry
> about how well the centerboard well fit the deck.

just about all the sailing rigs I've seen for kayaks use leeboard so it will not effect the kayak when not in use. Just unbolt it.

> Before the deck in installed you should also mount blocks for
> reinforcement in those under-the-deck areas where you are going to put
> fittings for the mast stay lines.

good comments

just my 2c :)