The great Spanish guitar maker Pablo Requena explains here in this video how he makes the head Nut on the classical guitar. Apparently a piece that for many guitarists goes unnoticed but which is of great importance and which directly influences the playability of the instrument, and the avoidance of unwanted noises that annoy us guitarists so much. As always, it is a process in which we have to pay a lot of attention to build it well and take into account many very important details in order to finally have an ideal set up in our guitars.