I agree that a piano key border would be too much and detract from the beautiful center. I would use a narrow (1" finished - cut it 1 1/2") as the inner border in the same white as the wheel and a 2 1/2" (finished - cut it 3") black border and also bind it in black. Your wheel in the center should be the focal point. I know it's a temptation to doll it up, but with a piece like this (gorgeous) you need to keep it simply elegant. You want everything that's "going on" to be the wheel. Less can be more. Barb