Rotating the spraybar IS an option IF your engine has midrange problems. However, in all the STs I've owned, none ever did. Guess I was lucky.

The method I posted for tuning an ST carb is tried and proven in the field (not only by me, but by many others), and it works, every time. There may be other methods, but this is the one I know works, and the one I use.

Dr.1