"I think they use the force to give the blade balance, and force. It would make since, and it would explain why non force users can't ever truly master the thing."
Didn't Kenobi say in Ep IV that lightsabers used to be common throughout the galaxy once? I don't think jedi were ever found in large enough numbers to be called 'common'.
(And EU fanbois, do me a favor and shut up - I don't care what the EU says, it's not canon.)