750 aed stumble off idle/start

I'am not familar with that carb but it sounds like a holley. A classic mistake when setting the accelerator linkage is to have play in it when its at an idle. The .015 you mentioned. There should be no play. The shooter should squirt fuel instantly when the throttle is touched. Same for the secondaries. That .015 is for wide open throttle to make sure the linkage doesnt bottom out.