I'm thinking the Thruxton needles may have caused that rich condition. They are probably way too thin on the taper for the setup and were letting in a boatload of fuel. Did you tell them you had these in?
Have you tried the TBS needles instead? Thicker taper that the Thruxtons but thinner than stock.
Switching to the TBS needles and putting the 160s back (or even something in the high 140s) might be just what you are looking for.
Exactly what is Jango running?
