You are right. In NATO they don't need to spend so much money on their own R&D but acquire licenses. Without war destruction they will be probably much better off then rest of the Europe.They CSE will for sure develop there weapons during and after the war,but one of the requests of the thread is improve Ukraine.for that to happened we need a CSE as rich as possible,CSE in an alliance with the West increase the chances of that.
So how about CSE alliance during the war,this will be compose of Slovakia, Romania, Ruthenia Hungary,and the soviet A-bomb as the point when the CSE alliance joins NATO, the CSE that joins NATO is compose of Austria,Romania,Hungary, Slovakia,Czech,( or Czechoslovakia if it is restored),and Ruthenia
With or without Marshall plan for them - after all they helped to destroy Nazis I believe CSE Europe Economy could be on higher level then today Austria. So if USSR fell in early 90-ties, but without Central and Eastern Europe under Soviets it could be even in late 70-ties or Early 80-ties, CSE Europe can start their investments in Ukraine but possibly also southern Russia.
Soviet A- bomb may some time later this time as Czech mines are not supplying material to Soviets.