Me, too.

Except on my first, I didn't use the rubber washers or foam under the seat.

The bolts chewed into the wood, and the seat rubbed through 1 layer of glass on the inside of the hull.

do what Jay say!

Shawn

: I'm finishing my 6th - all with a fiberglass seats. I make what Nick calls
: cheek plates, except mine travel from the deck to the floor of the kayak
: and are epoxied in place with fillets. They are positioned so my
: fiberglass seat (from my own mold) fits snuggly between them.Then I simply
: drill a hole through the seat and through the side plates and fasten the
: seat with a stainless 1/4-20 flat head bolt and lock washer. I use fender
: washers on both sides. On the seat side, I bend the washer in the vice to
: have a curve that matches the seat. I also make a rubber washer that goes
: between the seat and the plate and also under the finish washer on the
: other side so it doesn't dig into the wood. My plates are made from 1/4
: birch ply.

: Under the seat I glue on some rubber where it's going to make contact with
: the boat floor to avoid any abrasion. Under the front of the seat is
: closed cell foam so the seat rests against that. Pretty simple

: Behind the side plates, you can store a pump etc. if your boat is wide
: enough.