But what are you going to do about that one cylinder that's 5% lean? Just because its sequential doesn't mean it has cylinder correction. That's in a whole other league of systems there.

For 90% of the people that have aftermarket systems in their cars, a batch fire Megasquirt will do fine.

Giving up 20hp on a 500hp motor, but spending 1/20th of the price is also a sacrifice I will make every time too.