Buy the BMW and the F1 wheel together for €299. And get an invite code for the CSW V2 Wheelbase.
For those that have ordered the BMW wheel, you can contact them and get the order changed to include the F1 "wheel" for €50.
For those that have ordered the F1 wheel, same, but for €120.
I don't know how fast they process the order, but the CSW Wheelbase is €75 lower for today as well.