Thanks for the explanation. My carb also has a long lsn versus a short lsn. I was under the impression that if you adjust the msn as much as i did i would have to adjust the lsn to compensate(The msn was 1 3/4 turns out). That just seemed like too much. What you say makes alot of sense and ultimately once set back to 1 3/4 turns out it idled fine and ran correctly again. So i guess the cup part was to far into the airstream disrupting flow leaning it out once fully warm. Man thanks for keeping me sane 👍thought i was losing my mind for a sec.