Rotorg33k Australia

Hey all i saw an interesting ignition set up recently , it was on a carbed PP 13B and it used a S4/5 crank angle censor , two (or four ??) ignitors found on the S2/3 electronic distributor and four bosch coils . . . without a computer . I didnt have time to quiz the owner any more than that as we were both at work (im a courier) and busy . The set up seems pretty simple in principle , but i was hoping someone out there in rotorland has either used this set up themselves or are familiar with it ???