Just waiting on the mailman to bring me the SCT X4 and new plugs I ordered so I can start tuning my new-to-me beast. I went with Unleashed for the tunes and I bought the SCT used from them with pre-loaded and 2 MKS custom tunes already installed. I had the chance to add 3 custom tunes of my choice affordably as well so I did, any suggestions you all might have for what tunes to look into? Of course I'll have to see what the 2 custom tunes are already loaded and go from there. Leslie over at Unleashed has been a godsend so far, his customer service has been outstanding...