Well for sure I had full TC on, no way I'm driving this thing on public roads without it. I do recall that the road was relatively high crown so that may have been a factor, but this was on straight road so no curves influencing anything, and I repeated this result on adjacent roads. I have not done another test, but I was out in the same area last weekend and had need to get on the brakes pretty hard at one point and the car seemed to behave. I will get it out eventually and give it another speed run with hard braking at the end and see what happens. Will report results.