I had to replace the mag tube on an 1892. I found a 24 inch tube and filed it down to 20 inches to fit. My problem is now the follower keeps being pushed into the receiver and underneath the carrier. I have an original and a reproduction follower and neither work. Is there some kind of crimp on the bottom end of the tube that holds the follwer in place? I know there aren't supposed to be any dumb questions but what did I miss?. Any insight would be greatly appreciated. Thanks Jed