me and my brother both bought used a-5's and we noticed that on the hopper side the "hose" or whatever is longer on mine. his stops and goes into the gun about 2 inches from the hopper and mine extends all the way to the grip. i assume that his is newer and they changed it a little but i want to know why? what does it affect and would we both buy the same e-grip or would i need a different one being that my "hose" goes into the gun on the handle? also, i assume that the "hose" is what makes the cyclone feeder turn after each shot but tell me if i am wrong. thanks guys!