OK without going into all the details I was pleasantly surprised by the eventual response received from Tire Rack.
Purchased Hankook Ventus Rs-2 Z212. Had two HPDE and one afternoon lapping with Proformance. Hot day and tires chunked after the lapping afternoon. WTF. Sent email and pictures to Tire Rack with several others following and the long and short of it, they offered a one-time accommodation on my next tire purchase.
Really nice to have a company stand behind their products and work to keep their customers coming back. Hopefully they forwarded the details on to Hankook Tires.
Earned my respect and business but I don't think I'll be buying another set of Hankook's.
Cheers!