Those are too small Mathias. They're only 6mm. I'm going to try to find something between 8-10mm+ before I resort to those. In the nickel vs. brass issue, I understand that both you and I would know that they are brass (and God knows I'm OCD enough to let it bug me), but if I'm going to paint them white you'll never see the color of the rivet anyway. I don't know, you got me thinking too much about this now! What to do....what to do.........