it's well worth the work to get the throttle cut or hold to work but check the trim after, if your 7C is the same as my 10C you set the trim and pitch curve for hold/cut separately, i.e. you can have many different trims,
It's so useful, on very windy days when I bring my heli in to land I get about a foot of the ground and hit the switch, the heli lands in a controlled and surer way with no chance of the wind getting under and lifting it up again, plus it makes the heli a bit safer when your putting in the battery etc.,