[Weebl]

It has 5 leds and only ever just touches the 2nd. Hmm might turn the boost up at tad then

Knock links are adjustable so no figure can be attributed to lights.

What you are supposed to do is induce a little det and have the link set up so the red light flashes when the car dets.

Personally I have just wound mine up to max sensitivity. Make sure yours is not set to a low sensitivity showing 2 lights before you wind the boost up

 

[Weebl]

the adjustment pot was totally clockwise - is that the most sensitive?

Been a while mate and I cannot confirm 100% but it would make sense and be the way you would expect to turn something 'up'