I did read you were looking at 30 series tyres in another M1 thread. Just a suggestion that whatever tyres you settle on 35 series in 305/315 rear will keep your speedo accurate.
For speedo accuracy you will need a rear tyre diameter close to the original 275/40/19 rear tyres.
This link may...
Autoglym Glass polish for hard to remove marks has worked well in the past.
For regular cleaning recommend Invisible Glass with this:
No transponder, the painters tape is to keep the tow hook cover from flapping around. Just taped it to the front bumper.
Out of curiosity are you running on track with Traction Control and ESC On / Off?
Select Sport with the shifter, so that the paddles are in full manual mode, when you are at a dead stop you will be able to select 2nd gear via the up paddle and take off in second. If the car is moving slightly you will remain locked into first gear until you reach a certain speed and then 2nd...
I believe its possible, not sure who in the US could assist you.
If your fitting Steeda springs etc, Id say that would complicate the calibration requirements further as the factory Handling Pack settings may not be appropriate.
Maybe Steeda could assist or point you in the right direction.