I tried the 9920 with a 10XL setup, but ended up with a HV 4.5 System. I love there customer service and support. And don't have to wait forever if I need servicing. Here's my G2R setup: (ignore the tire direction, I was in a hurry to take the pic)
I've since replaced the bats with the lipos and added the spektrum telemetry kit for temp and voltage monitoring.