We recognize that every instrument is unique and there is no guaranteed set-up that will maximize the performance of all instruments. However, we have installed Frirsz tailpieces on hundreds of instruments and learned the following:
In general, the lower the tailpiece is installed the better the balance and resonance, because open string area is maximized.
It is important to keep the instrument horizontal throughout the installation process. This will reduce the chance of the soundpost coming loose while the instrument is not under tension. If the soundpost does become loose when the tension is removed it means that it was not properly fitted and installed. See a qualified luthier to correct this condition.
Small changes in tail cord length, 1 – 2 mm, can make an audible difference in wolf tones. Experiment to with this if you have a persistent wolf tone, and remember that small changes are best – work in small increments.
When removing the bridge, don't let the fine tuner on the tailpiece fall on or scratch the top of the instrument.
Take tension off strings gradually – don't completely loosen one string at a time. When re-stringing, gradually add tension across all strings. Do not tighten and tune one string at a time.
Keep the bridge straight and perpendicular to the top of the instrument while bringing the strings up to normal pitch.