You're going to enjoy it, Jerry!
It wouldn't take a lot for me to collect the issues that had notable changes in them. For example, though by replacement Bantam Book and my original (long gone) Bantam Book had the same cover artwork, I recall there being a photo in my lost one of an engine service area with Geeps at the service rack. I remember that, because I tried to build a service rack like it (best I could at the time) using model airplane balsa wood and painted it silver. In the process of painting it, some of the paint splattered onto the page showing the photo!
Andre
