Fountain of knowledge mate.
I try my best... fortunately so far there have only been questions I can answer. There are however so many I can't; the more I find out the less I know it seems.

Wow, I didn't realize that the Rebels had been quite so successful in capturing them. I may have to re-think my next order!
To be fair it was more like perhaps even numbers of abandoned/broke down vehicles to captures (roughly 139 in total, of which 98 were put back into service and the rest used for spares). The T-26 was actually Spain's 'Main Battle Tank' right up to the supply of U.S. vehicles in 1954, barring 20 Panzer IV and 10 Stug III acquired in 1943.