I need help finding clear tying instructions for the ?Bonecrusher? fly, and hopefully a good photo of it.

Larry Dahlberg developed this bonefish fly, and according to him, ?During the development of the fly, I had with me EVERY bonefish pattern marketed by Umpqua. I tried ALL of them side by side with the fly I was developing. (While fishing in the Bahamas and Seychelle Islands) The vertically tied bonecrusher outproduced the other flies about 5 to 1.?

I have Googled this fly and came up with references to Orvis and Umpqua for photos which do not agree with Dahlberg?s description of the fly. Also Dahlberg?s tying instructions were not very clear to me.

Can anyone provide good tying instructions and a reference to an accurate photo for the Bonecrusher? Thanks and regards to all.

Bill