Sincraft, Listen to Bill. He gave you the correct information. Once you get it right, leave it alone! Don't let any "expert" tinker with it and mess it up. You don't need every lat "R" out of that engine. I always run mine a little on the rich side, but with good transition from low to high needle.
ORIGINAL: William Robison
Sincraft:
Get it running at full speed, peak the HS needle. Down to idle, pinch the fuel line. Adjust the LS needle until the pinch gives a slight rise in rpm before falling off with the pinch. Go back to full and set the HS where you normally have it for flight. Now back to idle for a moment, then go to full. If the transition is now clean, leave it alone. More probably it will sag a little, so open the LS a bit and recheck the high speed - the two needles will interact a bit - and recheck the transition.
Can be a bother to get it right, but once it's there you might never have to touch it again, unless you make a large change in the fuel.
Bill.