Thanks much for posting! I am relocating to Seattle next month, and will miss my favorite track so much.
As others have mentioned, you are pretty smooth, but can tighten corner one, which would allow you to carry more speed thru the esses, and carry more speed into the back straight. In my 135i, I was braking at 151mph indicated (prob ~140 actual), and I know the M3 could at least equal that.
At higher speeds, be careful feathering the throttle thru 3 & 4, as your car can get very unweighted there, and trust the amazing amounts of extra grip the concrete strips give you. The further inside you are, the more camber on the road there is. (you know what I mean, if you've done a track walk before)
Gonna sorely miss WGI & LCMT out on the left coast.