I'll open with tweaked my mixture screws a hair. It's been getting leaner lately with foot off pedal. No lean condition at all with high vacuum if the pedal is touched and all my leak tests come out clean, so I don't think it is a leak. Maybe my screws moved again on their own (not the first time, but I wrecked the loktite by moving the screws when I took a roadtrip to a land with air), or maybe I somehow got some muck in the needles.