Okay, the mods have reached a decision, or rather we've agreed to differ and not kill each other (much in the spirit of the Cold War!)
Apologies for the delay: partly time zones and partly the fact that I was away from home much of Sunday.
Rule 3 has been amended to read as follows:
3. You can choose to depict any real nation or alliance of nations which existed during the real Cold War (including neutral countries that were affected by it but not part of either bloc). Alternatively, you can choose to depict any fictional nation/alliance your imagination can come up with, as long as it falls within the broad theme of a global capitalist vs communist confrontation that lasts from the end of WWII until the early 1990s in which nuclear-armed states seek to compete with each other but avoid direct combat that may lead to nuclear escalation. Your scenario may therefore involve a 'hot war' (i.e. one where actual lethal combat takes place) so long as a) the war is a 'proxy war' of limited scope that fits within the theme of the super-power stand-off, and b) if it involves a nuclear-armed state in direct combat, then it cannot involve an opposing nuclear armed state in direct combat.
By way of example, you can have American forces involved in a shooting war against Soviet proxies (North Vietnam or North Korea (note that China didn't have nukes in 1950)) or Soviet forces involved in a shooting war against NATO proxies (Afghanistan), but you can't have a shooting war in which NATO and WarPac forces are engaged with each other.This is in answer to Kit's question below. In short, you can have matériel that's involved in a localized 'hot war' as long as it's relevant to the Cold War and your alternate history doesn't have NATO and WarPac forces in direct combat with each other (because that would be a WWIII GB, which is something else entirely).
Here's a question for the mods.
Does 'Cold War' also cover the various Middle East Arab/Israeli wars during the same period?
One of my ideas would depict an IDF/AF aircraft supplied by 'A Western Nation', modified with parts from another 'Western Nation' that would have been in combat with aircraft supplied by 'Eastern Bloc' countries.
I may have already started a couple of the parts from the other 'Western Nation', and it's possible that they may be very long wings............ 
But I've just glued to tops to the bottoms on each side.
