During the innovation project I have tested the new inserts of Mr. Zoltán Lakat and Tamás Horváth several times. I can affirm that the invention does have a positive influence on the timbre of the instrument. This influence depends on the material (the inserts can be made of different metals, woods and bones), the shape and depth of the hollow on the insert, and how these different parameters are combined. These different combinations impact the volume, the sound, the dynamic balance of high and deep tones, intonation of different shifts, and how the notes are started (reaction time). I would like to highlight one important characteristic: the deepest notes sound lighter, cleaner and more powerful. Each flautist can find the headjoint they need, based on their individual style and taste, from the several available variants.