Carter 2BBL carb- I am stuck

I have the above Carb on my Duster. No matter how much I turn the fuel/air mixture screws the engine does not change.

I will be the first one to tell you that I know nothing when it comes to carbs. I can pull them apart and rebuild them, but can not tune one. It is not just this Duster but any carb I try to tune
A guy I know that runs a garage (not a wrench turner) tells me to turn them clockwise till they stop and then go CCW 2 1/2 to 3 full turns. Then leave it alone.

As a fall back, I will do that if I forget where I am in the turns.

I have ordered another rebuild kit that should be here Monday. I want this carb running properly so I can determine whether or not I will upgrade to a 4bbl.

One other symptom, I left out is every night when I park the car, the carb drains itself. I put a check valve in the fuel line and no help. So somehow it is draining into the intake manifold. I have a couple hoops to jump thru but it starts beautifully

Feedback welcome from all but one of you