hi,
you can continue guessing...
...or go to this page, it might be the answer for your questions (it's NOT a shop):
http://www.elektromodellflug.de/hoch...romstecker.htm
it's in german, but at least you can read the figures.
I would call this guy a guru regarding RC-Electronics (chargers, batteries etc).
I have just ordered myself some golden 5,5mm plugs, and some fat 6 mm˛ cables (especially for motor-esc).
flo