Had an older Digitron I sold, have a FAST air fuel meter I use for 4 cycle stuff. Thinking about a new Digitron but thought I would ask what tools everyone is using for tuning? ?Seat of the pants? is an answer, but I want numbers and graphs I can see what is going on and why. Reading plug color and other basic tuning methods work, but sometimes do not tell the whole story. Whatcha got?