Hey lou thanks for asking about this, I had the same question for my FJ. I was planning to do the tennis ball bailer thing as I have seen those available from some of the FJ parts suppliers. But I am intrigued about the "fill it with foam" technique. Since I am really only going to be pleasure sailing my little FJ I want it as floaty as possible. What kind of foam are you guys talking about and where would I get it?