I think I agree with Steve.
All micro max would likely result in some very unsafe flights, since with the weight of the parts it looks like you need a cluster of at least 12 to get an above ground ejection delay on the MMX 2, and probably 20 to get a safe stable flight.
Of course it could be done with just 2 or 3 MMX and a flash pan / closed tube launcher (mortar), wouldn't even matter how many lit, as long as one did for ejection. I don't think we should encourage that kind of design.
Bob