I just have a 46 AX, that I broke-in last weekend. Mine was very rich on the low side. Your going to need a tiny flathead screwdriver, in the center of your control arm on the carb you'll find the tiny screw way down in the center.
I turned mine in about 1/2 turn before it would transistion well.

When I say tiny, its very tiny, 1/16 slotted screw driver.
So far mine has been great, especially mounted upsidedown on a pattern-ship.