Difference between old-fashioned and Modern guitars http://www.rdiaz.org/rd-art%207.html
Post-Paco de Lucia's Age in Avant-Garde Flamenco Guitars
http://youtu.be/5Pw4mNtVHeU?t=14s
Negra Vs Deep Blanca http://youtu.be/WT-P00nkPeE?t=14s
Deep Blanca Vs regular blanca http://youtu.be/VYjtePq5OBY?t=14s
Playability & Low Action Re-defined http://youtu.be/deKDnCb1H7o?t=14s

*Ex.1/ 00:14 solo 1 RD tangos
Ex.2/ 19:01 solo 2 RD tangos
*Ex.3/ 01:10 solo 3 Buleria falseta from "El Chorruelo"
Ex.4/ 05:43 solo 4 Buleria falseta from "El Chorruelo"
Ex.5/ 06:25 (topic)
*Ex.6/ 02:15 (drawings)

Acclimatized to Obsolete Guitars http://youtu.be/q_MkQjgbjUM?t=14s

Easy to play status on modern flamenco guitars http://youtu.be/5oIcoG43LRU?t=14s
Just need 2 things to learn https://youtu.be/1As8_P1JyF8?t=14s
Buleria composition up-date https://youtu.be/9h0Wf2uhLlk?t=4m58s

Ovangkol Negra = Redefining The Flamenco Negra / Mild-Male & Twin Guitars http://youtu.be/eTE94gdIQtQ?t=14s

Hand made flamenco guitars can't be identical 100%
https://youtu.be/rTLlZEpNh5U?t=14s

"Pulsación" and Beyond http://youtu.be/X1_bUg62QOA?t=14s

The last word about "action" in flamenco guitars
https://youtu.be/T5grenEYuCA?t=14s