Nice Bobby, Like the radiused top best
Have you thought about using a pointed roundover bit for the cutout? Whiteside 1/2"D 1/4"R works well for thin stock(see pic) a little slower but safer for the fingers. Not good with tabs, but decent with "onion skin". I think a contrasting wood dowel(or even a blind dowel) would look nice vs. screw head. Show her a couple VCarved tops too
People can spend big bucks for something that sits in public like that, and a Spice Shop would seem to have a higher end clientele that are proud of their kitchens. Maybe "Gift" them a super fancy/ridiculously expensive one for the shop? Makes the basic one seem like a real bargain!
You might be surprised.