Opjose,

the only thing I didnt try is 14x4. Otherwise 12x6, 12x8, 13x4, 13x6- tried them all. I accept the 55ax is good enough for this airplane- for pattern. With a 12x8 the airplane flew with authority. I did all the pattern moves I am familiar with and very well. Evn with the 12x6 (on Sunday) and 13x6 (on saturday), when I had concluded it couldnt 3d, I had the confidence to demonstrate the rest of the flying at high throws (triple rates were set in my TX) to some aerobatic beginners. In fact I was confident enough to fly upside down, do the slow roll, knife-edge- usually moves I dont even contemplate on my airplanes on a Saturday when I am lacking practice. But it couldnt hover, harrier, flat spin, waterfall etc even at 3D throws.

Like you said, there is something wrong with the 3D setup... or this specific engine doesnt have the power for 3D

Ameyam