Most important tips I can give you:
1. Do exactly as the equipment tells you, not what you think should be right.
2. Make sure you add/subtract weight from the correct positions.
3. Take your time, slow and methodical is the key.
4. Make sure your setup of the equipment and also the running speed of the rotors is correct and consistent. If you are going to be a few % over the running speed on run 1, then be a few % over on all the runs.
And finally, don't get hung up on number of runs, I've made a career out of helo vibration and I can assure you, some aircraft will balance in a couple of runs, others can take longer. Its the end result that counts. As long as what you do is methodical and progressive then stick at it.
The 2020 will easily give you vibes of sub- 0.2 i.p.s.
If you are using one ACES downloadable scriptfiles, then make sure its the exact one for your helicopter type and model.
Again, you can always pm me if you run into trouble.
PPS