PBM Mariner
I've seen this bird of Sparky's and it is truely an outstanding piece of work. The process is as simple as balsa, sand and sculpt.
I have to say that it seems that it is a quicker method of building and design, and that is coming from someone who sells cut wood parts. Simplicity. That is what gets you up in the air quickly and Sparky can write the book on it.
Kyle