As of May 2017
AMWill's mailbox is full. Please just ask for the 6% discount when ordering on the phone. We at MustangEvolution cannot get in contact with AMWill. We have been told by other members that if you mention you are a member of this site and ask for the discount, they will give it to you when ordering.
I've also been informed that they respond to Facebook.
It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.