Just bought the EGO 15" Deluxe Hinged Trimmer yesterday with Rapid Reload Head and there is just no way shape or form that the Guard will install with the 2 Screws and 2 Lockwashers!! I must have wasted over an hour trying to install the Guard. The screws go in but just keep turning then fall out - they just won't lock in. It's as if there are no threads in the Guard itself. This is extremely disappointing for a $300.00 String Trimmer. Can anyone please offer any advice? Any comments would be very much appreciated.