We make a distinction between bow setup and tuning. Bow setup should have the bow ready to shoot within the factory specifications, whereas tuning aims to make the bow more forgiving and improve arrow flight.

Bow Tuning Maintenance
Once your bow is set up and initially tuned, the continuous process of improvement commences.

When following this process, always make notes of your changes and the behaviour of the bow. If you’re shooting higher scores, keep that change, else reverse it, and do something else. Do not overdo it, and don’t be tempted to do too many things at the same time.
When working on a bow it is very important to remember that it is not the bow that shoots the score, it’s the archer holding it. Time behind the bow is always more valuable than the time spent changing things in your set-up.