No Alan, I have no (0) experience with either the Turbo Zabytki or the Audiobas system. My MZ has the original points/battery ignition, my Jawa has a Vape system I bought a while back, then for a much lower price (I chose 6V). The Vape has worked flawlessly, and has required no work at all. It's pictured on my 634 in one of those threads, re-linked here:
The Vape (PowerDynamo) system has quite a good reputation and I think the current price, particularly for MZ, reflects market forces and demand from particularly Germany. The much lower price of the Polish systems should not mean those aren't any good, IMO, but I just don't know. My wife has a Chinese CG125 copy with a GY6 ignition, which has also worked flawlessly now for well over 40k km.
I installed the Vape system on my Jawa 634, primarily because the original system has the ignition very distant from the main bearings, making it sensitive to vibration at particularly high RPM. Those points were right at the far end of a tall stack, making the timing inaccurate. Anyway, with the Vape system the high RPM performance has improved significantly. On the 251, the ignition/generator stack is less tall than on the 634, and it runs fine; this is why I haven't yet bought any other system.
But in view of those considerations, I would be reluctant to fit the rotor via an adapter (see Kruh's text), and he is right: it is very important how well balanced and solid the rotor fixation is. And how close to the main bearings - one of those pics looks quite unappealing.