Lately this F bass has been getting a lot of use, it's a BN5 with a spalted top and a birdseye board. That birdseye board is the absolute bomb for slappin', it has a perfect bounciness that responds easily to the touch and is rich in nuances. It feels ever-so-slightly more comfortable than an ordinary maple board (been playin' a couple of those too, one of which is a GFC - the "P bass of F basses"). Why that is I don't know, maybe the knottiness gives the wood some slightly different properties? Anyway, it works real good.