Cisco Kid,, i don't have a 46AX , but i do have a TTpro46, so to get to hear the 4 stroke firing mentioned , start your engine, open the throttle fully , now start to open the needle valve bit by bit until you hear a drop in engine rpm. While standing behind the engine , you should start to feel the cold unburnt fuel coming out of the exhaust, along with an increase in the exhaust oil, Now at this point you should hear that the engine isn't running sweetly, but is in fact running very rough, that is the 4 stroke point, to get back to 2 stroke running wind the needle valve in slowly, an eighth of a turn at a time until the engine peaks out at full revs, then open just a couple of clicks and go fly.
Bill form down-under in Australia.