you can see the white wire running into the box that is the only wire hooking the CDI to the ECU..

we are running 8 of the bosch HEC715 coils,
this system works perfectly fine but yes adds a little extra cost for the ignition box.
im pretty sure motec and autronic use what they call a multiplex output which is a combination of 4 wires fired at different times to fire 8 cyl direct fire no a single wire.
i have no problems running V8's in wastespark which i run on my own race car using LS1 coils which so far have been fine at 1500hp or so, if we run out of spark ill switch to the M&W single wire and 8 CDI coils.