I made my reflex/deflex longbow Exactly like this. Very easy. My kit came from Rudderbowns. I did a Tri-lamb actually. Osage Belley, Ipe center core, and a Hickory back. The shrink wrap holds everything extremely tight. Especially when it is cooked to a Bow Oven. Bow Ovens are also very easy to make yourself.
Great Video, Thanks for sharing.