Interesting - I've used both the Stu Miller and 3 Rivers calculators and don't recall encountering any errors with the data I've used for both carbon and wood shafts.
I didn't check anthing else. I'm setting up a bow with the Centershot 340's, so that is one that I tried. "Error". Danger Will Robinson!!!! The calc. does'nt seem to recognize it. At the bottom of the page it even states that the tool has a few bugs in it, or words to that effect. Still, nice tool.
