With 30% nitro it will be a rocket. Put a perry pump on it too. That will add a bit more power by supplying a bit more pressure, you will have to play with the pump pressure and engine low needle. I'm running a pumped saito 100 on 30% heli in my 7.3 lbs gp extra 300s and the vertical is completly unlimited. With 15% nitro the extra sux but WOW what a differance going to 30% made. I also had to go to a 15-6 prop to keep the rpm down (up from a 14-6) With the 15-6 the rpm tops 10,000 on the ground so in the air probably 12000-13000. My imac buddy threw everything he had at her and the extra did his entire routine, including rolling loops. If you want to see what kind of flying he did I'll post a vid of one of his routines if u like.