This is shown also Jon in my Autorotation video that I know you've already seen but you can possibly see or hear the diffs as I'am using Throttle hold upon take-off... What I do, is I turn my throttle hold on... Then I flip into one of my idle up modes... Then I flick the throttle hold off, and the heli engages its soft start, spools up, and is already in idle up... So when I'am doing my Auto's and cutting the power in the air using Throttle hold, the heli lands, I wait a second, and then turn throttle hold back off and take off again repeating the process... Soft start makes it nice however, so you don't have a violent spool up. I think your Gaui 550's soft start should be adequate but just guessing...