I've used the Incra HingeCrafter to make wooden hinges for several boxes, although I almost always run into the same problem: one or more of the barrels of the hinges break when I drill the centered hole UNLESS I use hard maple for the hinge material. I've tried using both walnut and cherry and pretty consistently run into the barrel breakage problem with both types of wood. I'm making hinges with ⅜" dia. barrels. There is no consistency to which barrel breaks (and every once in awhile one drills cleanly). I clear the drill bit literally after each hole and I blow out the spaces between the bushings after each placement of the hinge. Don't get me wrong, maple looks good and the hinges work well but there are times that I'd like to use something else. Anyone have any experience that might be helpful?