I know you said not to mention anything about silver and bronze but I think my idea on how to use them is something that you will consider ok. My idea is just for the orbit and landingpips of the grand tour. I think bronze should represent one body orbited/landed silver 2 bodies and gold 3 bodies. This allows you to show all planets orbited or landed on not just 7. This was just a thought I had I just want your opinion on if a system like this would be something your interested in.