Sounds good to me mate, it was wet for my first ever track day at Donny in '04, the old 535 span a couple of time's, once i had to get pulled out of the kitty litter at craner, the back wheels went in to the patch of kitty litter in the top left of your picture
The main marshal bloke had a moan at me said i was driving too quick or some thing but TBH i wasn't deliberately getting the arse out every where, especially Craner !
The other spin was at the same corner as you are at in your picture but it didn't leave the black stuff that time. I was comming into the old hair pin and left my braking and down change too late which made me over steer into the corner and just at the apex it was still over steering but i thought i'd got it under control, just after the apex it swapped ends very quickly and i endded up park the wrong way around roughly where the tow truck would be in your picture. I had short scarey wait whilst 2-3 cars went by as i thought i might get collected before i could move
This is a short clip of the old E34 going around in the wet, i was virtually the only car on at that point.
http://homepage.ntlworld.com/a.law47/vid%201.mpg