OP - So I gave it a shot over the weekend. There's a learning curve for sure. From what I can tell, the box came out fine (function though not form). But the paddle was off. I used a 1/4" piece of oak for the paddle & maple for the box. I get great sound out of the right side but not much off the left. I swapped the paddle for one that came with a box call I bought some years ago (cherry, I believe) and it all works great on both sides. So it seems to be the paddle that I messed up on. Is there a trick to getting a nice, even convex curve on the underside of the paddle?