I did go through the old school way with the mixture screws. It runs smoothest and highest vac with them 1/2 turn out. The 750 liked them farther out, like 1-1/2. I figured the 1050 idle circuit needed some work after that. I pulled the intake off looking for any sign of a vac leak. I have the bathtub with gasket on each side. The gaskets had a good imprint from the bathtub, BUT on the bottom rear ports the gaskets were wet. I couldn't tell if it was from gas or it was sucking oil up from the valley pan. I don't like the imprint on the carb gasket vs the spread ore pattern on the m1. I did spray carb cleaner around the carb base, and the top of the intake to head, but maybe it's leaking on the bottom side?