Newer forum poster here but long time forum visitor. I spent a majority of my time at Carlisle in the engineering tent( wife was thrilled) in an attempt to get the info I needed to make the decision whether or not to buy a 16 z06 leftover or wait for a 17. I am planning on purchasing an m7. Spoke to Peter Ho regarding the cooling issue as he told me he was on the team that was responsible for that. I got the strong impression that if ordering an M7 I would be good to go but if ordering an A8 it is still considered to be a work in progress as previously mentioned in this thread. He commented that most of the work that has been done was to cool down the rear cylinders that were causing the car to go into limp mode. Since I don't plan to track the car much, I also talked to many of the engineers there about other changes that you would notice on daily driving. I spoke to Phil( can't) remember his last name several times as many of the other engineers referred to him as the authority of model year production changes. He commented like most years, GM has analyzed warranty claims, JD power ratings and other reviews to target problem areas/ complaints on the 2016 car. He mentioned that besides the improved supercharger, extra cooling, standard rocker side skirts, there will be numerous tweeks and changes that 2017 owners will notice and appreciate. He mentioned a faster electronic interface for the touch screen and mode select delay, a new tune/ programming for the mag ride that will make the touring mode noticeably softer and a larger delta between touring and sport unlike the 2016s, easier closing doors, better camera for the rear( although he said he thought they had taken care of that during the production year of the 16's. When asked the question regarding a 16 vs. 17 he just smiled and said he would wait for a 17 as I would be much happier. He seemed to be a real nice guy and sincere. For me, since I am going after an M7, I still plan to wait to see what this months incentives bring before making a final decision. Hope this helps others in the same situation.