I've had an SF3 for a few years now for use on my 2003 F250 Super Duty V10. I know I'm not the sharpest crayon in the box when it comes to computerized tuning and I'll admit it. I want to know if anyone can help me better understand the adjustable options packed within the unit, how to use them and the performance effect on my truck as well. This truck is used primarily to tow at GCVW. To be specific, I have options for Global Spark, Spark by RPM, WOT Shift, Shift Pressure, WOT Fuel What is best for this vehicle under this load? thanks