T-Rex 600EFL Tail Vibration/wag ?

[rapyd]

I have a tail vibration (don't think I would consider it a wag, but not sure) as I start to add throttle from 0 to 25% stick (no vibration) from 25 to 55% it goes away, add more stick and it comes back. Now at this point I see that it is a wag, but I think wherever the vibration is coming from is causing the wag. I have been thru this build tons and the head set up is PERFECT, I have 13 +/- pitch, 9 degrees cyclic and 0 at center. The 3GX is no differant than the 3G setup. There is no sub trim in anything. The tail rod is perfect.
The TT bearing is off center of the tubejust a bit as the book requires, it's almost like the TT is vibrating inside the tube.
Any thoughts or suggestions would be apreceated
Thanks
Dave
Also, anybody run into the USB not connecting. Im trying to set up the model on my computer and when i Plug in the USB it shows (linking in yellow) the flash's to (Fail in red) what's up with that.

[BlackTitanium]

For CC Esc's that don't have an internal BEC, you have power the ESC with a LiPo.
I use a 2S LiPo to power the ESC, when using the castle link.

[rapyd]

I'm using the stock align BEC to power the ESC, yes with a 2S lipo

[BlackTitanium]

It's not a BEC, it is a Voltage Regulator that is for powering the Receiver.
You only need to power both the Receiver and ESC when doing the throttle stick calibration.

1. Launch the CastLink Program.
2. Connect the ESC to the CastleLink.
3. Connect a 2S or 3S LiPo to the ESC.
You should now be connected to CastleLink Program.

[BlackTitanium]

Please watch the Finless Bob video:

Part 1: Initial heli setting on the bench
VIDEO -> Castle 85HV initial settings for a Helicopter (70 Megs)