I did one in our 29.5. It came out pretty easy since the water had pretty much rotted the foam. Used scrapers and a Soft wire brush to get all the old residue off the hull. We got the liner from Sailrite. We used a spray adhesive I had left over from doing a car head liner. Make sure you dry fit good, I found a plastic putty knife worked well pushing it up under the headliner. Not too bad of a job. Good luck.