With the method we found, which is correct down to the last digit testing on real trade ups with different input/output float caps this is what it would look like:
World #1 Lowest (Float: None)
Or
First skin with a float actually outside its own float cap (0.0599999949336051)
Trade up float calculations has changed, I found what appears to be the exact way they are calculated now: go.dev/play/p/f0czFp4gGh3
Majority of #1 floats are probably unbeatable by trade ups now lol.