I have a super tiger 2300 and a tower hobbies .75 that are both giving me the same problem, if I pull the throttle back fast after running at full throttle the engine quits. If I pull back on the throttle slowly the engines dont seem to have the problem. I have the idle and forward transition tuned in but cant figure out the full throttle to idle transition. I set both engines so that on idle to full throttle transition their is a very slight hesitation from being slightly rich.

P.S. the tower is running a bisson pitts muffler.