I have a 2005 Sylvan 16ft flat bottom with a 15hp 4 stroke Johnson. After using the boat for about a year I thought it would be nice to do some modifications to make it easier to fish, and set drop lines out of. So after coming up with a plan and much research on others modifications, I started the project with a buddy. We used 1x3 white pine for the frame and used joist hangers to attach them on the existing seat up front We decided to make a 4ft deck up front with a door opening to utilize the space under the deck for storage. For the back we built a small frame with decking so that its easily removable to access drain plug and battery. This weekend we plan on putting a sealant on the wood, and carpet it. I will post more pictures as we have it completed. We still have other modifications to make, but we are waiting for our fishing trip next week to Tennessee to finish them. I will put together a supplies and cost list soon.