First and foremost, a huge THANKS to
@swatski! I most likely would not have done this without you providing the seat. MUCH appreciated!!!!
So my SeaDek arrived and I when I placed the order, I asked them to include the extra mat for the step-thru. Once all my SeaDek was installed, I decided to tackle the seat. I removed the existing seat, placed the pad down in the center and measured the distance so I knew where to cut. The top of this picture is the front of the seat. I measured in 7 inches from the center of the bolt on each side. On the bottom of the seat I measured in 6 inches and drew the lines for a cutting guide. I then cut the vinyl ribbon and removed the staples for the area I was going to cut.
I placed the mat on the back of the seat just to make sure everything lined up correctly.
Once I cut through the black backer board (creates a huge mess), I flipped the seat over and cut the vinyl right down the center. This gave me the excess to pull under the seat and staple.
I then flipped the seat back over and removed the black back piece I had previously cut. Leaving that black piece is makes the seat rigid so it was easier to cut the top side. I then cut the foam right down the middle in order to separate the right and left sides.
Once it was two separate seats, I then folded back the vinyl in order to cut the foam. In a previous failed attempt to do this using plywood and foam and vinyl from JoAnn's fabrics, I learned that the best way to cut the foam is with a serrated bread knife. I cut it flush with the edge of the black bottom.
I pulled the vinyl slightly tight and used T50 stainless staples to hold the vinyl in place.
After all was said and done, I installed both seat cushions and the SeaDek pad. While it may not be perfect or quite as nice as the JetBoatPilot versions, I think it's going to work out well. My biggest goal was to keep people from stepping on the seats. At least we know it's now possible to do. Again, thanks
@swatski for hooking me up!