Oh my god, I'm way new, building my first ARF. Ive been buying servo extensions and such at the LHS for big bucks wanting to make my own. I've been a computer geek for 15 years, and kept looking at the connnections of planes knowing I've seen that before.
You can salvage plugs from old computers. The LED, speaker and other similar plugs will fit the pins of a Futaba, HiTech or JR RX. The wire is usually heavier guage than the original battery pack's so it is an upgrade.
I'm all set now. Just go root around in some of my old computer boxes in storage and I'll have a bunch of good plugs in no time...
- Joe