Technical guitar exercise of combined fingering 1 4 & 3 2 - Marcus Nalgaber
https://www.youtube.com/watch?v=IbDATy_OYOM
Technical guitar exercise of combined fingering 4 1 & 3 2 - Marcus Nalgaber
https://www.youtube.com/watch?v=vOJmHSKLehA
Technical guitar exercise of combined fingering 4 1 & 2 3 - Marcus Nalgaber
https://www.youtube.com/watch?v=Bbp8F9T3G2s
Technical guitar exercise of combined fingering 1 3 & 2 4 - Marcus Nalgaber
https://www.youtube.com/watch?v=OXNZW33Y3DU