As we are well into the build process, I need to figure out what I want in the way of p'up covers and knobs on my bass. This Eshenbaugh SC6 has an ash/alder body with Koa front and back. The neck will be maple/black limba/*black veneer*/black limba/maple. The board will be gaboon ebony and the bridge will be ebony as well. All hardware black. Do I go for contrast or compliment on the p'up covers? If the top is koa, it won't be grain matched, so should the grain of the covers run parallel or perpendicular to the top? For knobs, I'm pretty set on koa-topped. Should they be ebony, ash, or alder?