I, 1st remove the seat hood, then directly in front of the rear hood, cut a notch using a dremel tool, then slide the coaster over the seat. When you slide the seat back on the butt to where you want it, you can then tighten down on the coaster, and the top of the coaster tightens against the butt, locking the seat in place. This only works with heat shrink. If cork tape is used, usually you have to use a seat that is way too large to get the clearance, so that it will slide. Tape on fuji seats are ok, but too much play for me when you have a big fish on and pressure is on the reel.