aaahhhh, the internet is again my friend. spending about 3 hours of searching and reading last nite, i found answers to questions i didn't even know to ask. charts on springing, distances of pull, how to wind your own string, bolts and feathers, and a awsome trigger assembly with many details. i really hope i book marked it and will try to find it again if i didn't. its gonna rain anyway. there is even plans to build a repeating model that can shoot 1 per second if your arms are up to it. . .
the bow itself on the one i want to make is 3/4" sch 40 pvc and some 3/4" dowel rod for re-inforcement those plans are on the web site
instructables.com along with many other ones.
more to follow. . ..