You've received some good replies. No need for more wood along the sheer. It is the fiberglass and epoxy that gives the deck-hull joint its strengh.

First, I give the inside seam a bead of thickened epoxy using the pastry-bag method (http://www.clcboats.com/shoptips/epoxy_and_fiberglass/e_pastry_bag.html ). This bead of epoxy works into the joint and forms a fillet to round-off the angle between deck and hull.

The epoxy fillet is followed by a strip of fiberglass tape that is pre-wet with epoxy when it is rolled up in a cup, so it only needs to be rolled out along the seam.

For the hard-to-reach ends, the pre-taping method described by Paul works great (see pic below). I use either a little hot-melt glue or a few drops of thickened epoxy to hold the tape in place until the cloth is wet out with epoxy from a brush on the end of a stick. To prevent a lot of epoxy leak-through, I put masking tape along the outside seam at the end areas and slightly thicken the epoxy used on the end tapes.

John