RE: AMO String Length
AMO is saying that a bow built to AMO specs will get a string 3" shorter than the AMO bow length. That doesn't really mean anything, it's just a standard if the bowyer wants to follow it. There are lots of bows that aren't made to AMO specs, and individual tuning will dictate what works best for that person. When I make a string, I get the actual string length that is working on that particular bow if possible.
Chad