2010 KEYSTONE FUZION Structure Problems

TOOK DELIVERY MAY 7, 2010 OF A 2010 KEYSTONE MONTANA MOUNTAINEER MODEL 347THT TOY HAULER. WHILE USING THE TRAILER WITH A HARLEY-DAVIDSON FLHT IN THE CARGO AREA THE LEFT REAR D-RING PULLED OUT OF THE FLOOR. IT CAUSED DAMAGE TO ONE WINDOW ON THE TRAILER AND TO THE MOTORCYCLE. I USE A BIKE GRAB TO HOLD THE FRONT TIRE OF THE MOTORCYCLE OTHERWISE THE BIKE COULD HAVE PUSHED OUT THE WINDOW. THE 4 D-RINGS ARE EACH MARKED 1200 LB. I DO NOT BELIEVE THIS IS TRUE BECAUSE OF THE WAY THEY WERE INSTALLED. CHECKED ALL THE SCREWS AFTER THIS HAPPENED (3 SCREWS PER D-RING) AT LEAST HALF WERE STRIPPED OUT. THE ENGINEERING ON THIS IS EXTREMELY POOR. USING ONE 1/4" SELF TAPPING SCREW WITH A 5/16 DRILL POINT INTO 1/16 ALUMINUM LEAVES VERY LITTLE CONTACT AREA INTO A SOFT MATERIAL LIKE ALUMINUM. THAT IS JUST THE CENTER HOLE. THEY USE...