The Colortune is a waste of money unless you are running a single carb set-up. By the time you get to where you can read it, it will foul out. Anyway I have one and it looks cool in the tool box, now if I could only find a use for it, because it sure doesn't help in setting the mixture on a twin carb spridget. Ranks right up there with the little blue pouch of SU tuning tools that sits next to it in the tool box.
Crash