A few years ago I posted a bit of detail about what was then my brand-new flotation bike.
Somehow, in the ensuing 2 years of using it for some really cool trips, I neglected to share the frame (and fork, and rack) builder's perspective. Please find that here, and give yourself a few minutes to read and digest all that Whit has shared.
It has been a fantastic bike. My only complaint at this point is that I don't get (or choose?) to use it often enough.
Don't hesitate with questions.