[noize]

Nice tutorial but the directions may depend on left or rigt-hander, right?

Yes, that is so, but as stated by me above-bleh, I type too much, and I'm a lazy fart sooo....scroll up and read my post regarding the current subject with right hands and such.

I don't know that much about all of this, but my opinion is it does not change for left/right handed people. You say they use different part of their brains, not for everything, and I do not think this is the case actually. It's a bit like saying that if we bashed our tail around like dogs too, left-handed people would handbang.