Motorman, I just use judgement because they have not built an analyzer yet, probably never will. I can tell you this, most of us who have worked on 2cycle carbs for over 20 years, can tune the better by ear and feel. I realize that you were not meaning to disrespects, but the beginners out there now and the garage mechanics, should not be adjusting today's carbs without some training. You say you are pro environment, but with the number of 2 cycles out there, they produce a lot CO gases than you think. Do you think I like shelling out $25 for the adjusting tool, just because the government said limiter caps don't work, and then worry every time someone asks to borrow it. Yes, the Feds do check. Just my opinion, which many on this forum say isn't worth much.