I am still trying to fix fuel leaks on my Zenith carb at the mixture control needle valve. I know: All I need to do is tighten the gland nut, but then I cannot adjust the mixture in flight. Misery loves company; they don't have carburetors, but I can identify with these folks: http://www.pddnet.com/news/2015/01/vw-audi-porsche-issue-recalls-fuel-leaks?et_cid=4386517&et_rid=568671104&type=cta
Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA