Hi,
I also use a HOTAS Warthog set.
To manage the four states of the throttle control (Cut-off, Lo Idle, Hi Idle and Flight Idle), I use the red switch on the right side of the HOTAS Warthog Throttle (this switch has three positions: forward, neutral and backward. Neutral is the default position and after pressing this switch backward or forward, it automatically returns to the neutral position)
Setting is as this:
- push forward = "mixture rich a bit"
- pull backward = "mixture lean a bit"
Each time the red switch is pressed, I move the throttle between the four positions, in both directions.