Zafer,
I will let you know what happens with the two servos.

Like you, I also thought maybe the engine angle and torque have something to do with it. Especially since I am using a saito 82 with a big, heavy 15x4 APC.

I originally was concerned about adding the extra weight of the two servos, but I don't think it will end up being an issue. The standard servo I am using now weighs 1.5 ounces and the wooden dowl weighs maybe an ouce. I am replacing with two mini servos that only weigh 1/2 ounce each. I will shift the battery pack towards the nose to offset this weight in the rear, but overall I don't think the total weight will change.


Steve