You can tell I’ve been drinking and thinking again... If the SU needles have richness “stations” (Progressive diameter changes) every 1/8th of an inch, why does moving the richness adjusting knob by as little as 1/4 turn make a significant and measurable change in AFR? The thread Pitch on that adjuster is 1.0 mm, so it should take 3.5 turns to make a one station shift..... Just saying, what the heck is going REALLY going on that no one wants to talk about... Is there more to the a