Great good job reading its important info; however, the info in that link also states clearly that when running low impedance injectors 4 or less you are operate the injectors with PWM settings for peak and hold type injectors. You are not reqd to run the flyback circuit, it is strickly OPTIONAL. When running more than 4 injectors you need to run the flyback circuit.

Board version has nothing to do with this because the v3.0 can easily be built without 4 flyback fets and be built like the v2.2.

Low impedance injectors are designed to be operated as peak and hold injectors. A resistor box just makes you operate them as saturated injectors. Do you know the difference of the two and how they operate? That is the key to understanding the design on the flyback circuit and why the flyback board runs 4 fets as opposed to 1.

Glad to see you taking the time to learn this. 50% of the people running MS now have no idea what the flyback circuit really does and why and how the injectors operate.

Terry