Here are some photos from previous threads.
Photo 1 shows the old and new followers side-by-side. The lower follower with the arrow pointing to it is the redesigned one. Notice the vertical notch/groove at the right front. That's what you should look for. If you have followers like that one you're up-to-date.
Photo 2. Redesigned one in the magazine.
Photo 3. Close-up view of a redesigned follower.