I want to get started building my own Quadcopter and was thinking of buying the following:  - ArduCopter 3DR-B Frame + Motors Kit (Motor AC2836-358, 880Kv with 12X45 EPP Style)   - APM 2.0 Purple Full Kit Assembled I have a 6 channel HiTec Remote control kit, but what else apart from the battery is needed to get up and running. What battery is recommended. Thanks Cedric