abosolutly amazing idea.
Personaly i would prefer something like
Outer Track:
Starting at the top and working clockwise (which is different to yours)
1 = Basic
2 = Fine
3 = Choice
4 = Exellent
5 = Supreme
Inner track
Starting at the top and working clockwise
The Q of the item (similir to yours) in Q10's
For example a Q9 wold have no inner filled, but a Q250 would have all filled.
Mainly becuase most crafters craft to a Q10 range.
however each block represents to the nearest Q10 so a Supreme Q250 would have everything colours in. A choice Q100 would have the 3 outer filled and 10 inner filled.
I really like your idea tho
// Anatti