My set up goes as follows

Hacker C50-14XL 6.7:1 ratio
Hacker master 90o speed control
Thunder power 2-5s4p 5300's (10s total)
2 astro flight 109's for charging
I also use the TP balancers every flight.
22x12 apc e prop

On this set up on the ground I am pulling about 65amps at around 2700watts. This has a ton of power for my Brio I have flown this combo about 70 times including the Nats and have had nothing but great things to say about electric. I have broke a gear box on my motor this was caused from to many flights. It was in Peter Collinsons Genesis then transfored to mine so at about 125 flights it let go. We have found that the gear box should be regreased after about every 50 flights. It is a very simple process and can be done at the field in about 30 minutes.

For flight time I usually fly about 9 minutes and put back about 3800 mah into the packs just to keep charge time down when practicing. I really like the electric as there is no worry when going to the field wondering if my motor is going to start and so on. You dont have to worry about getting the idle to low where it will die.

Maybe Todd Blose will chim in here as he was running the Hacker 13xl and see what he has to say about this setup.

Andrew Jesky