I was just talking today about how I thought this plane would be a mean machine with a DZ in it. My Goldberg Sukhoi is an absolute beast with a YS140L, and I think the DZ would be great in the Edge with single aileron and elevator servos, Li-ion batts, and the carbon fiber goodies as well. Right now I have a 1400mAh NiCad in the nose along with the CH ignition module, a 700 mAh Nicad for the receiver power, a 6V regulator and Jomar Glitch Buster, and an 1800 mAh NiCad in the tail for the servos. I use 4 Futaba 9252 digitals and one Hitec mini for throttle. My total weight was right around 14.5 including the Brison 2.4 and muffler. I am using a straight down muffler on the inverted Brison and the weight with muffler and ignition (not counting battery) is around 3 lbs. I also have a bit of lead in the tail, but not much anymore after adjusting my CG. I think you could easily build one under 13 lbs with the YS as long as you used light batteries like a LiIon and you don't bother with dual aileron servos or tail mounted elevator servos. I can tell you that I had no flutter issues with mine and they only put out 110 oz in each.