As I said in my posting to everyone, please avoid hexagons: "Hexa is the greek prefix for 6. Hexadeca is the greek prefix for 16. No hexagons (6 sided shapes) please unless they are somehow contributing to sixteen elements."
I find #39 has too many colours. It also has 20 elements rather than 16.
I like the choice of colours in #38. A variation on this that used eight sections would have sixteen elements: 8 bold outlines and 8 shapes in the middle. Not sure about the arrow though.