Nano Katana + Fret Scanner: High-Quality Fret Leveling

This ukulele was used many times during the development and testing of Bisso F-Scan. The neck was not perfect: it had twist, irregularities, and a complicated geometry. With 2.68 mm of action it was still playable, but I wanted to bring it lower and make the instrument respond in a way that felt better to me. At low action, the fretboard has to be coherent. In this video I show the process: listening to the instrument, lowering the action, scanning with Bisso F-Scan, correcting with nanoKATANA, scanning again, and checking the result by sound.