And remember, if you are going to mess with history, look up the real version first.
Do not use soviet-stereotypes to project how they would act in your situations; look at the stability of the government, economy etc. at the point in history you stage something, and see if you can get the statistics to back up your alternate-history.
See if you can find any events that could turn out differently, like ones where simple human folly determined the outcome.
I cannot wait to see how this story turns out; it seems like a very interesting idea.
I just write poetry to throw my mean callous heartless exterior into sharp relief. I’m going to throw you off the ship anyway. — Vogon Captain (The Hitchhiker’s Guide to the Galaxy)