RE: OS 1.20AX Unexplained Flameouts.......>>>
If it's not already fixed, and if you determine that it actually quits at or near idle, you could have a throttle servo that is not centering or holding it's position well whether it is new or used. Vibration will get to these servos sometimes and / or new ones will be defective. It really shows up at idle.
Ernie Misner