Almost works - XS Sight Systems Magazine Tube Detent Swage - Rem 12 ga RE-7000-1

I was careful and had to knock this in 6-7 times, still had to get out Drexel and file to make room for magazine follower, had to put in vice after each use to get it out of magazine tube? I put oil on it each time I use it, never made enough room to let follower freely slide. Works only if your ready to do more work at the end. I did not want to drill holes, so there are still slight bumps in magazine tube at the finished process. Was hoping this would be easy, it was not.