I just watched your vid, nice idea on teaching people
Idle up doesn't make your heli spin at 100% throttle the curve does that
For example, brushless most seem to prefer 60-80% for personal preference Headspeed and headroom.
If while flying, It is also better to change to idle up above 50% stick (65% plus) so your heli doesn't fall on transition. It is also a good idea to match your curves for normal and idle from 50% to at least 75%.
Though since the heli does have soft start from Throttle hold you can spool up at a 100% just fine.