Hi, I've come into possession of some HO building kits, unbuilt and still in the package. Since I'm a 3-rail O gauger, I don't know much about them. I have several styrene kits from Magnuson, which from what I can tell was founded by the same people who founded Design Preservation Models. There's an Illinois address on the packages. I also have several DPM kits with a Crestone, CO address on the package, so I know they're fairly old because DPM has been in Missouri for as long as I've been paying attention. Finally, I also have a couple of Creative Design Models kits, with a Georgia address on them. Since it appears that Magnuson sold out to Walthers in the 1980s, I'm guessing all of these kits might date from that timeframe, or perhaps earlier. Does anyone know where I might be able to find more information about these? Thanks!