OK guys..I'm going crazy here trying to figure out which way to turn this nut at the bottom of the SU carb. Looking down at the carbs from the driver's side (left) of the car or the side of the engine where the carbs are, I've been turning the nut clockwise or to the right to lean the mixture. As far as I can tell this unscrews the nut or lets it out thereby leaning the mixture. Is this correct?