Would Olive Ash Burl make a good top wood? I've been looking at different woods on the web, and I noticed that this one looks really pretty, yet I can't find any evidence of it being used for instruments. Same goes for Mapa Burl. Is there a reason for that? Do these two woods not work well on instruments? Another wood I really like is horse chestnut, but that stuff is really expensive. What other woods would you recommend that have similar characteristics to horse chestnut? Maple Burl? Myrtle Burl? ________?