2. well...the grinding sounds and feels alot like grinding gears...which is not good on my part...and the lockout is more of a gate that opens if i'm not mistaken?

5. yeah...i cracked my other one into like two pieces...and i found the screw behind the hazard button after the fact...also...what about the left side where the left vent is...i also cracked it there...any suggestions for that part? thanks again