I don't think MS does multiple sparks, either.
I planon using the Ford EDIS-8 system, and getting rid of the distributer from the ignition system. That's supposed to good for up 8,000 rpm's, and a good aftermarket coil will produce a really hot spark over 7,500. Although CD boxes are available, I'm not sure they're a big advantage with EDIS - especially considering the cost.
Regarding the EDIS, I found this in the MSIII documentation: "
It is important to be aware that while Ford EDIS and GM DIS both have special toothed wheels, the module handles all the decoding and presents a signal to the Megasquirt that looks like a distributor input. With these two modules, the Megasquirt does not know or care how many teeth are actually on the wheel, so do not use the "trigger wheel" setting. This also means that normally you cannot use sequential fuel with these systems as no engine position information is available to the Megasquirt. "
Looking at the comparison chart, I'm not finding any compelling reason to use III. And some good reasons to use the II. Oddly enough, the II does not have a fan control, and the III does not. How odd. But, you could probably configure one of the switch outputs (of which there are many) to control the fan relay.
Megasquirt Product Comparison
I'll probably save the dough and use the II, with a Ford EDIS module. Decent price, good performance, and good reliability.