Is it possible to permanately damage by attempting to lower the string height?
u mean altering the action? no.
Well I don't think so. Unless you are really strong and could manage to bust some hardware by overtightening. To be sure you don't f up though, do it in tiny incriments and tune between. Same with neck adjustments. Not sure if that helps at all. But good luck my sir.
Thanks. And by the way, my hex wrench doesn't seem to be small enough. Is there any other way to do it?
Not to be smart, but, buy a smaller hex wrench. That's the only way.
Ok, thanks man.