To design, a lot more than it was supposed to (six months or so...). To fold, something like three hours. And instructions (Crease Pattern) is available in my blog, here (spanish, and no folding directions) [link]
oh well - "grafted" fingers? the head is pretty cool, but the only thing i would say isn't perfect is the tail, and some advice:you could make the "scales"(excess flaps due to reverse folding) stand up to make it look cool no criticism, it's my second favourite eastern dragon after Ryu-Zin. well done!
I thought about it, but I decided that rabbitear-ing the points in the tail would look awkward with the scales of the body, and the simple look of the model would be compromised if I shaped he scales like this. I never really tried it though. It may work.