I’m certainly glad they don’t have that system on the helicopter PT6. Opening and closing the throttle then modulating and using the starter and also activating the idle detent is already a bit of a dance of the hands.
Yes, exactly why I'm asking this. My nephew tells me of a couple ways different pilots have told him on which finger/thumb combination to use to accomplish this dance. I told him I would not do this digital gymnastic and risk my finger slipping off the starter part way thru the start after light-off.