wondering how many people are running the resistor. i might take off from truck around 2500' or so, but mountain riding more like 4000' to 6000'. i know some say it's not needed and you can run in ethenol mode (with non-eth fuel) and be ok. also the only non-eth fuel i can get is mid grade 90 octane. i don't really want to take resistor in and out for when above 5000'. what's you're opinions? thanks