Somehow I don't get the warm fuzzies about your preferred mechanic... the lines had NOTHING to do with your problem. And it's possible your old m/c was ok too (can't tell now). Sheesh, stories like this make me glad I do all my own work...
Funny part is, "those little brake lines" give you a FIRMER pedal! Perhaps the Toothless One should start reading the MBShop Forums?