again - baseline, and go from there. I think you're on the right track. Main CAN affect idle, 1/8th throttle, but it's mainly in the air jets/screws, plus the pilot.
Baseline the carb back to stock on ALL jets, then start over. Your chasing windmills until you do this.
a near-death experience is just god following "catch and release" regulations...
john (johnny) henley