Here we are!
Hi Paul,
ACE is pretty easy to set after a couple of goes and will work in different modes for different types of paint (single or double colour).
You set the mode via the display and are provided a small pen like screw driver to turn the sensor up and down.
The manual tells you differently but I turn it right down, load a ball (having set the mode to ACE 1 or 2), hold the trigger in an turn the sensor slowly until the marker fires then turn 1 complete revolution (clockwise) and fire a few strings off to test.
Why are you asking this though? E-Mags can now have dynamic sensing, so no need to set any more.
Mine is back with it, C & C and LX soon! (wife is saying boys and toys over my shoulder
)
HTH.