My '89 Chaparral 2100SX has the integral swim platform off the back. Hope you can see what I mean from the picture. While at the lake this Memorial Weekend I had my head stuck in the back of the boat looking for a leak. I just did bellows and wanted to make sure I did a good job. In addition to water in my bilge I noticed water sloshing around way in the stern of the boat back where the swim platform is. There is a compartment back there that is hard to describe, but where the swim platform wraps around the outdrive. We had a lot of rain the night we arrived and the boat sat on the trailer with the camper enclosure. Then we had a pretty good storm with some high waves on Sunday, but I still have no idea how water could get back in that compartment. There is only about 4 inches between the wall that creates the compartment back there and the top of the hull structure. Wish I could get a pic back there. I'll see what I can do tonight. Anyone ever experience anything like this. Any ideas about how to figure out how water got back there? Thanks for the help!