WHY DO IDENTICAL H3'S HAVE DIFFERENT D RINGS?

I BOUGHT MY H3 WITH A FACTORY GRILL GUARD, WHEN I REMOVED IT THERE WAS A LITTLE HELPER SET SCREW IN THE MIDDLE OF THE D RING TO HELP HOLD THE GUARD UP SO ITS A 1 PERSON INSTALLATION, TOOK 5 MINUTES TO REMOVE IT
I SOLD IT TO A PERSON, AND OFFERED TO PUT IT ON FOR HER, IT TOOK ABOUT AN HOUR, BECAUSE THE SET SCREW FOR HER D RING WAS ON THE BACKSIDE OF THE PLATE, HAD TO REMOVE BUMPER COVER AND SKID PLATE TO GET AT IT.