Very good video, congratulations!I would like to kindly say to you that if you have a chance for a remake or an update to the video, to consider this point: Usually most of the strings from any manufacturer (apart from exceptions) are put in a small envelope winded in a round form and one has to unwind the string in order to put it on the guitar. This practice by itself gives a twist in many places of the string, so, when one unwinds the string from the envelope form and frees it out, the string releases many of the twisted places but not all and not completely. Many times, a string producing a bad behavior in intonation and in octave harshness, has its cause on this specific problem, that at its run from the bridge to the nut the string is twisted in some or many places and it is not running smoothly and even and straight throughout its journey from the bridge saddle to the nut. To avoid this problem one can as soon as the string is tied at the bridge, to pass one's hand tightly through the string's mass from the bridge all the way to the other end before puting it into the hole of the machine peg and it is best to repeat the action for three or four times. This process is like ironing the string so all the twisted points and places are straightened out and making the string sit on the machine peg and get tuned in a completely straight manner with no twists whatsoever. With this technique we avoid any bad intonation to occur on a string which otherwise will be a good string producing good intonation, harmonics and octacves, fifths, fourths and thirds, etc. Since you made such a good job on this video I thought to give you an idea perhaps for an update. All best to you, Bravo and keep up the excellent work!!!