hey i just got into paintballing and i got a silver egal brass egal gun, it has this diaginal thing that a normal hopper wont fit in, so i bought this elbow feed, the thing about this is the elbow feed has two different holes one has lines that makes it thicker, while the other is smooth, so if i put the hopper in the smooth one it fits but the other end wont fit in the gun and it the same the other way around? whats wrong?.....