Concave Faceting: Dalan Hargrave, Pt. 1 George Ellis
http://www.youtube.com/watch?v=Yp_0T2JFisw
Concave Faceting: Dalan Hargrave, Pt. 2 George Ellis
Concave Faceting: Dalan Hargrave, Pt. 3 George Ellis
Dalan Hargrave: Concave Faceting, Pt. 3 George Ellis
