RE: ESC beeps normal on each start?
Glad to help out!
They are fun to build and then fly them.
Having built the T-rex will help you with building your Gaui 550
both heli and radio setup.
I ended up getting a GY 401 gyro yesterday to replace my
Telebee gyro. It's on its way now.
You did good to get the 401 to start with.
Good luck with your helicopters!
Tom