Here ya go, Epuller. I built one myself, and it works like a charm!
I'd show you pics of both the cresting machine and some finished arrows, but evidently imagestation's site hosting isn't working anymore -- at least on this site. Even my sig pic's not coming up anymore, it seems like.
But here's the link. I did go ahead and order the Bohning chuck from King archery (or something like that) to make sure my arrow was connected real well. I think that cost me an extra $6.
If you've got any questions, let me know.
http://www.stickbow.com/stickbow/arr.../cresting.html