I wanted to easily adjust the weight trim of my kayak to select the amount it waethercocks into the wind. So I designed and built a sliding seat. It is easy to adjust so I can move it while on the water. Moving weight back decreases the weathercocking. I also lengthened the cockpit cutout to 33 inches long for easy butt first entry with my long legs. With just me in the kayak the seat location has settled at 3 inches behind the location shown on the CLC Ches 17 plans.