RE: 30 minutes flight time from my Super Sportster EP!
You'll love it.
The combination transforms the plane.
I'd suggest flying it for no more than 8 minutes on the initial flights, then bringing it down and while hanging onto the plane run it at 75% throttle until the ESC safety kicks in.
This will give you an approximate flight time.
Subtract about 15% of the total time, and you'll know how to set up your timer.