Sorry for getting my info here late, but here is what I ran at the Nats this year.
I ran the Hacker C50 13XL and the Master 90-O-Acro speed controller.
I also ran the motor on a Hyde soft mount with a nose ring
The batteries are Thunder power TP5300-5S4P with a APC 20 x 13 E prop.
The Charger is a Astro Flight D109 and I have 2 of them.
The 90 amp speed controller works very well, But you can also use the Master 77-O-Flight
controller with the same results. That is what Chip had in the Biplane and it works very well.
Hope this helps