That's what I thought too, lookyj. I took electrical tape and wrapped it around the boom where it would touch the CNC head & I still had the problem. I think I'll start with 2 fresh tail motors and see what happens. Seems weird as I know that Choppers is running duals with no issues.

The glitch it creates is this: It almost appears that the heli is going into negative pitch from positive. At no predicatable time, I will be in a steady hover and "wham" she drops to the ground like a brick was set on top of it. It doesn't pitch left, right, forward, or backwards, just straight down.

The stock tail works fine in FFF, I was just hoping to gain a little more tail authority as I'm progressing to more agressive flight /manouvers (sp?) with it.

For what this heli is and it's size, I'm still impressed with it for under $250.00 dollars.