Ok, so today I install deans ultra connections on my batteries (stock Nihm waiting for lipos)
and on the Axe CP. I also installed a new carbon fiber boom, so I had to re-solder the wire
on the tail rotor motor. I go to test it out and the tail rotor turns on full speed. Everything
was working fine just before that. Any Ideas. It's really hard to hover with the tail spinning
at full speed.

Thanks in advance

The tail motor plug and the battery plug are identical. Are you sure you didn't change the wrong connector and instead plugged the battery directly into the tail motor?

I think I figured it out. I moved the Bias, a micro and that solved it, kinda.
I tried the gyro, and tail adjustments, they did nothing, but just a slight movement
of the Bias worked. I still think I need to do some more adjusting, because this
thing doesn't sit still in a hover.

Thanks for the reply