WOW, i learned a lesson, DO not tighten any scews on the blade lol. other night i went over everything went out to fly today and it was like flying for my very first time on a simulator. lol
My blades were to tight and i had tighten the lil screws under the main rotor bladed and the top screw above the head, wow it was vibrations really bad, i put everything back where it was and its fine now.

The book tells you ZERO about maintenance, so what do you need to look for? just make sure none those screws are going to fall out? but are supposed to be loose.