Interestingly, it seems Italy did acquire the licence to produce Gebauer guns, but only in 1943.The Skoda power trains were not developed well. The armor was rivetted onto a frame and offered little advantage over the Fiat. Same for the suspension and track running gears. The Italian tanks were actually BETTER in that regard as were the main guns. There might be something in the Gubureaux machine guns which were better than the strange Breda M38s.
The T-21 had a bad power train? Interesting, I wasn't able to find anything on the Turans having breakdowns or other mechanical failures, but then again it's hard to find anything on them.