Well, it is very hard, very heavy, and very dense - more so than rock maple and way more than mahogany, (which is used for necks). If you can believe this - it is used in construction in Latin and Central America It's too beautiful for that! I was considering it for a fretboard. The main snag that kept me from asking for one is that it is oily and has a rep for being difficult to glue. But, that is a generalization. Wood can vary as much as the growing conditions. Cocobolo is supposed to be oily and difficult to glue, but half of my bass's body is being made with it. I think it would be a great choice once you knew you had a board that wasn't too oily.
"Turn on Beavis & Butthead voices" Dude you said Stiff and Wood. Cool heh hehheh! "Turn Off Beavis & Butthead voices" Sorry I couldn't help myself
Stiff enough, but too heavy. The axe will have serious neck dive, and I wouldn't be surpriced if there were some dead spots. A neck shall be very stiff and very light, with a very hard fingerboard. As a rule of thumb...