RE: Hangar 9 46% Ultimate
This depends on if you use Hitecs and plan to use the programmer to match or use JRs and have to match some other way. If you are going to use the Hitecs and match with the servo programmer I recommend the Flight Pack 7, TurboReg and PowerExpander Pro. If you plan to use Hitecs but not use the servo programmer or use the JRs then I would recommend the Flight Pack 12, TurboReg and PowerExpander Eq10. Either way I would also recommend the Ignition Cutoff. Other items such as a failsafe switch vs mechanical switches is something that is personal preference and if you let me know I will recommend the right items.
Please let me know how I can be of further assistance.