The video below addresses the questions regarding the follower and base plate combinations that will and will not work and expected results with each set up. Just to be clear the only combination of base plate and followers that will work is the +4 follower with a plus one base plate. All other combinations of followers and base plates are not guaranteed to work your results may vary. In the video you will see Contradictory results from my claims about last round hold open please be aware results will vary from shooter to shooter and load to load. Thank you for your support and if you have any questions please contact me through email Facebook or any other social media.