Started on a new project, whuddya' think?

I weighed it (including decking) it will be 13 Lbs. ??? oz. without servos ETC. ETC. I was thinking of another chainsaw engine, but a Nitro wouldn't be out of the question. What size nitro though? what prop? I like the pusher type so I would be limited on prop sizes wouldn't I ? The last pic is what it should look like when it's finished. (still deciding on color)