Frank surprised you didnt mention the air vane rest position adjustment? I have already inspected the upper half of the air vane housing. Regreased the ball on both sides of the air vane pivot. I looked at the stop plate with the integrated switch? I noted that to make any adjustment to the mechanical stop a pin needs to be pushed in or out of the air vane housing? Is that a mechanical electrical switch used for the safety switch. This switch when opened breaks a ground connection allowing the fuel pump relay to switch from 87 (12v from ign switch,start) to 87A (12v from fuse box, run). But agreed the mixture control adjustment changes the position of the plunger. If the adjustment ccw the plunger is lowered.