Arrow 3D [pdf]

This model was designed in 2010, but I wasn't able to diagram that first arrow, the design of the first CP took me a couple of days.
To find an step by step sequence, I started changing the proportions of the arrow and looking for refrences, at the end it took me weeks of calculations, using most of my spare time.
This model is 50 steps, can be folded using 15x15 kami, and the pdf also includes both CP's.