I like the super hard and difficult woods as long as they don't need to be carved or require a lot of hand work. They "machine" very nicely with sharp tools and carbide is just about a must! Some of these difficult woods are getting close to how aluminum works. So with your woodworking tool things have to be sharp, sturdy and make light passes. Lots of the exotics are very oily, like coco bolo. You'll want to wipe it down with lacquer thinner or alcohol before making any glue joints. For this application I would also suggest enduring the misery and use a polyurethane glue. All the problems are worth the time and trouble when the wood looks good in the end.