Info on FBO ecu unit

Dave,
You make some good points [ pardon the pun ].
However I do not agree with all of them.
Honda made an engine in the 1980s [ the name escapes me ] that had a separate mini combustion chamber next to the main chamber. The mini chamber was ignited & the flame travelled through a small gap to ignite the mixture in the main chamber. The theory being...you want as a big a 'flame' as you can get....
The trade off of a smaller spark plug gap providing increased current is that less of the combustible mixture is then exposed for ignition of the mixture to take place.
Ign systems are full of compromises, eg, more inductance in the pri winding means more energy available to transfer to the sec winding & ultimately more spark energy. But more pri inductance means a longer time to saturate the winding, & could lead to misfires at high rpms &/or when a coil has to fire a lot of cylinders.