Thanks for all the help: Clip, EarthDog, and jackknifeh - the seller info is especially useful!
I tend to use Wikipedia sparingly - even with something scientific like wood properties - unless I can easily follow the source links, I tend to take the info with a grain of salt. (it just brings out the worst in people, like YouTube comments) I am surprised that woodworking professionals and craftsmen don't have a resource like PubMed or Lexus Nexus online. I guess that is why they call them trade secrets
Thanks for the Cocobolo info, Clip: I am not a fan of this type of wood, but this attention to detail is what makes the craftsmen here on this forum the best.
I have never seen a seller post this type of practical, detailed information.
Once again, thanks for all of your hard work! I hope to post some pics here once my first handmade mule is done. Until then, it's a secret.
*** If anyone else has some good info or their favorite sellers/sites, I (as well as everyone else) would love to hear them. Thanks.***