The biggest risk with a Firebird Commander is losing it in wind. It flies so well there is a big temptation to take it higher and higher. Here are my thoughts on how to avoid losing it:

1. Recognise that the wind is very likely to be much stronger above tree top level, so don't be surprised by it
2. Always fly upwind of where you are standing
3. If, having ignored 2., you are in big trouble and can see it disappearing downwind at high altitude, keep your nerve. There is a technique for getting it back, provided of course the wind is not absolutely too strong. The technique is:
- turn it into the wind.
- let it GLIDE back to you. Resist the temptation to apply power. That will just make it climb to where the wind is stronger.
- apply power ONLY in short bursts if necessary to help keep it turned into the wind

You will find that it will penetrate the wind much better under glide than under power. Your biggest problem will be accepting that that is the case and keeping your thumb off the throttle.

Always clearly label your plane with your contact details before you fly anyway!

IMHO 3 channel planes are actually better than 2 channel for beginners, exactly because of the problem with wind. At least with a 3 channel you can bring it back to you under power and down elevator.

No, I've never lost a plane to wind but I've come close, so I can understand the panic that you feel as you see it disappearing, still flying beautifully.