Fitting out the cockpit. I used a commercial seat and back rest for speed and neatness. The back rest is tied at the side with thin line (red) to wooden fittings glued to the hull. These have a row of holes top to bottom to provide adjutment. The back of the back rest is tied to a wooden loop under the rear of the coaming. Initially I used the straps which came with the backrest, as seen here. But the plastic buckles slipped, so I've now swapped to thin line as for the sides.

This shot does no how the knee hooks I've now glued under the deck at the front sides of the cockpit. Again, commercial items available off the shelf for speed and neatness.

The seat is attached to the kayak floor with a velcro strip at each side. It stays fimly in place, but can be removed for cleaning. Also good for getting the position just right.