I have two FML DF pre-ban mags in very good condition. Glock looked them over along with my gun some time back and replaced the springs and followers. However, the followers don't seem to be the right fit - they are marked "5" and they hang up at the top of the feed lips like they are too tight - they won't come up as far as my 10 rounders. They lock the slide back (most of the time) but don't have enough sticking up for a good spring out of the gun during mag changes. Any suggestions? I started filing on the one (the follower) but don't want to go too far without other suggestions. Is there another follower that will work better (different model # from Glock). The followers I had in them orignially were fine. Thanks.