How did I find it? Good old fashioned computer hacking. (My brother came across it in a search engine) My brother (not much of a mopedder) used it to build a pipe for his goped. He had to guesstimate most of the figures, so the straight pipe header he built instead worked better. He had to put a bunch of curves in it and it came up about 8 inches short as a result. It's kind of cool that there's a program like that for free, though. Don't you think?