Fanatec adapterplate steeringwheel
This is an adapterplate for the Fanatec CSW wheelbase and a non-Fanatec steering wheel (with mountpoints 30 degrees offset).
Be warned: when using a non-Fanatec wheel, the force feedback will NOT work.
(The base 'sees' if an original wheel is attached, so if you did not incorporate an original PCB, the FF will not work. I am in contact with Fanatec to see if there is a solution to this).
[EDIT 18-08-2017] The reply of Fanatec was unfortunately not very helpful; One has to use an original Fanatec wheel (of the Fanatec hub). There is no way to get force feedback working (unless someone out there is able to test with a sacrificial pcb of an original Fanatec steeringwheel and finds a solution).