Binghams cost more and (build your own bow $15.00 I think)
you are not suppose to share (Post) plans for someone else that did not pay for it.
I have both and that's what I read.
It takes a lot of work to draw a bow and give measurements and patterns for people
ask kenny he did it, and had to charge you for it
It was cheep and a good design.
I measured a bow that I bought
every inch, width and thickness on the limbs
traced the reflex and swung a tape measure to find the radius, then drew it on my CAD program