Ye stock, since Tada said its around 7:40 car and A70TTR mentioned the prototype did 7:38 so I guess a +~5-7s for production model seem resonable. Between M2 and M2C... I thought there were more changes that affect "speed" between the two. I really wanna see more times from shorter tracks. MKV will be slower on straigh ttho, esp on higher speeds.