30 seconds of brace scalloping. I tune the main resonances before closing the box, with the soundboard already glued on the sides. This ensures that once the box will be closed I will be very close to my final target, which will be achieved mainly by tuning the External Tuning Slot.
For more info on this technique, refer to my manual "Mastering the sound of the acoustic guitar" available on the catalogues of @stewmac_guitar
@maderasbarber or Amazon.
![](https://i.ytimg.com/vi/_XzbEmjnBP4/maxresdefault.jpg)