Looks good, Barb! I've always liked the looks of those piano key racks, but I've never seen one in person. I like your wood choice, and the finish looks nice.
A few questions...
How do you determine where to position the dowel holes? (Or is their position not overly critical as long as they're in the same place in every key?)
Do you have to do anything to prevent unused keys from flopping open? I realize that's not a problem for you given that you've already filled both racks.
Why did you cut the keyholes horizontally instead of vertically?