Resembles string tuning?

To tell the truth, I've moved idle stopper screw unintentionally few days ago and the condition of AD motor in VW 1302 is disconnected with the best condition. The reason is clear that the throttle butterfly position isn't in the best position,too much opened or too much closed,may be opened.
Judging fror the the information in the Web sites on Solex 34PICT3 carburetor, the throttle butterfly initial angular position is fundamentally important to be fixed firmly as the starting position of carburetor setting procedures.
Then why did I moved the throttle positioner,such an important and critical point?
The mistake is based on the point that the 34PICT3 carburetor should have the stopper at the most closest throttle butterfly position, so I had believed,otherwise the 0,0004 inch thickness cannot be established using some gauge.
I realized that no stopper exists for throttle butterfly there after some considerable loosening of positioning screw on earth!
Now the positioner is set now around the original position but not so accurate as information.
I know the butterfly angular position requires very precise adjustment and should be firmly fixed for following adjustment, there exist three spraying holes and the fuel is supplied adequately according to the rate of throttle opening.
The butterfly angular position in relations with spraying holes near the closest throttle position would never be known until ascertain in direct visible checking after removing the carburetor from the intake manifold?
The carburetor setting resembles the tuning on music strings devices, so said in the VW video.
Strange phenomena that the idling speed increases when stopped on rising slope?
Anyway carburetor would be checked including closing state route in very near future.