Hi,
the standard 04949 (or it's brethren with different color plastic or aluminum case) will work well.
Just Rescue can not be guaranteed under all circumstances—in most cases, no issues, but on some helis, you can do what you want, the horizon will keep tilting or even flipping :-/
But here, the external sensor would not help, it's a 3-axis (silverline type) gyro only.
As to Rescue, with VBar Control, you can safely see if it will work, using the Rescue Status display in flight.
Kind regards
Eddi
Born to fly ...
forced to work.