Just assuming the CVX-20 bottom hull half is the same on Timi's, Sprints, and Ski Machines? At least as far as tie down points? Like Jeff stated, those tie down u- bolts go through a separate block of plywood. During my Timi resto, those were the only two pieces of wood that weren't rotted. Its a sinking feeling to find rot in your boat, but as others have stated, you should check it.