Bob,
OK - thanks.
I'm starting on this huge spreadsheet that will be based on using each different version of the instructions for the rows to try to lay all this out. That's the only way I'm going to even be able to try to keep it all straight.
Even the K-25 Alpha (BNC-50K, cut your own fins) has at least two different motor mount arrangements. Since then the big changes were die cut, then laser cut fins, going to a blow-molded nose cone (at least two shapes at different times) and several motor mount variations. And then there's the livery changes, culminating (for now) in the one you started this thread with.
I flew a BNC-50K/cut your own fins by tracing around the SP-25 pattern Alpha at NSL, done up in the simple two-color livery, but substituting the white with gold for the 50th year. That one was a little hard to find on the ground....
Parts for it came mostly from a late 1960's kit I got on eBay but which arrived with a crushed main body tube. Fortunately the one constant for all Alpha variations I've seen is a 7.75 inch-long BT-50 for the body.
Note to others reading this: by "Alpha" in this context I mean the K-25, later 1225 Alpha and it's bulk-packaged and starter/launch set packaged compatriots and not Alpha II, III, or IV (though I believe the Alpha IIs all have 7.75 inch BT-50s as the main body as well).