as chip said, 12 point seems really silly. but that was the switch that was used back in the day, so that's what people still use.

in reality, surely 3 (low, medium and high) or 4 would be enough?

EssexAaron get in contact with RP Lab. they will be able to do the conversion that you want and allow you to run adjustable boost with only 4 injectors.

it's only said that it can be done with just 8 injectors, as that was done before by some people, and others can only buy the same stuff from the supplier. they're not clever enough to write the code themselves. RP Labs are however. they have many years experience with the P8 ecu writing custom code for it to allow many different inputs and outputs