
, Let's not forget the many, many twin stick Spitfires converted
in the field by the Soviets during WW2. They produced many more than the 20 or so 2 seaters produced in the west after the war. I don't have any pictures to hand but they looked a lot like the La-5 UTIs and La-7 UTIs in the way the cockpits were arranged on the same level (similar to the Bf-109G-12 and Fw190-S.
It's thought that the Soviets may have converted over a hundred into this configuration if not several hundred and they were all done at front line units or aircraft depots. I'm also sure I read that the La-5 UTIs and La-7 UTIs were also all converted at front line units or aircraft depots and all these conversions, Spitfire, La-5UTI and La-7UTI were done quickly often with squadron engineering officers and NCOs doing and supervising much of the design and conversion work.
As far as I know the only 2 seat conversion trainers built on a production line in the USSR during the war were the Yak-7 trainers, although I'd be willing to stand corrected on this point if I'm wrong.
Cheers,
Ross.