My current Bravo doesn't have a sunroof, but my previous Bravo did and i used the method below to fine tune it.
Do this if the sunroof works fine and the relay cuts in to stop the sunroof in the tilt, norm and slide position.
1. Manually use the sunroof switch to align the sunroof to the position you want. (i.e to raise by 1cm)
2. Undo the Centre Courtesy Light.
3. Undo the sunroof motor.
4. With the light still attached and the motor, press the switch (any direction) all the way until the motor stops, press it again in the same direction. It will either not do anything or the motor will move again and stop.
5. Once it wont go any futher. Press the switch the opposite way. Until it stops.
6. Dont touch the switch again and refit the motor and courtesy light to the sunroof.
Now when you try it, it should stop perfectly at the norm position, tilt and slide position.