Great tune my friend. For racing softs, up the PP to 550 and use the standard wheels. This makes it point so much more accurately into the corners, and it stops better. 550PP is fun, but not the quickest, but who cares.
Excellent tune....but you really do have to get your entry speed right. Brake early,gently through the corner and not too early on the gas. Get it wrong and your back end will be overtaking you :( but once you find that sweetspot you will be rewarded with consistently fast lap times :). Another very good BMW my friend.