hi eiji
that's a beautiful and very interesting bass! is that an early 'fan' peghead? it's striking with the standard point body. the flame-koa body is gorgeous, and it goes beautifully with the rosewood top and back. i've never seen that combination before; in fact i've never seen a koa body before
reinier, perhaps eiji will confirm this, but i believe those are low-profile mandolin frets. they are/will be a feature of my 'simple bass', which is under construction
marc