Customizable Hole cap

I had three holes in my bathroom sink's granite top, two for cold and hot water faucets and one where the water came out. A very common thing for some years ago.
To modernize it I replaced that with a new mixer (you see it in the picture), but it uses only one hole. What to do with the unused two holes on the top?
I designed these hole caps to be used in a such situation to come in help!
But I know that every place in the world has it own top thickness, hole diameter, etc. so I made this design customizable! What better way to learn myself some rudiments of OpenSCAD...? :)

So, whatever you have a hole that you want to be filled with elegance or you want to use this as remix base where to build something on your hole, this is the model for you!

Please put a picture of your use of this objects in the "made" tab of this thing! :)