Yes, the approved method is to have a board handy like mentioned above. Turn the screw in about 1/4 of a turn at a time, and blip the throttle after each adjustment. If it hangs and doesn't drop right back to idle, that's far enough, and back the screw out 1/8 to 1/4 turn. You'll most likely have to adjust your idle back down, as it goes up with the increase in fuel.
I can screw mine in until it stops with no runaway.