used the Hks boost controllers and afc compared to Blitz and greddy and apexi? I don't know of too many Z here using either of them in great numbers. Have you seen the new HKS AFC? The thing is not user friendly to program like the Apexi. The product manager for HKS acknowledged they are not up to par on design of their electronics. He was nice guy to talk to. He had a Ford Focus Show car built by HKS that he was driving.