cloead, that screw I think just holds the plastic spacer piece to the chassis, just install a new one. Your chassis does look to be a Losi 3.0 nitro chassis with electric conversion kit installed. You can call it a Losi E 3.0 because of this conversion. Just remember that when you say Losi E 3.0 that most people refer to the actual Losi E 3.0 electric specific car.