Kid's, I'm enjoying your posts. Trying it add floatation is not an easy task, and there are many ways of achieving it. Attached is an idea that I had a few years back, that could be adapted to any 6x6 or 8x8. I made it removable for the addition of tracks.
Update: Tried to add .pdf but Gallery doesn't accept it, so cannot link it to this post. I could convert it to a .jpg, will try later maybe or sent me an email and I will attach it.
bisco@rogers.com