It works! 
It was quite fun at first to see the Kalman filters slowly adjust to tacho and gyro ratio. It overreacted and put me straight into buildings :-)
I did not loose GPS position once, even if I was off position sometimes. Aspecially at beginning in thunnels before calibration was done.
I will make U-tube tomorrow.
With antenna on roof, and with pcb in alu-box I think it will work even better!
Connected to IBus and power only, speed and direction is decoded from communication and has not got to be wired separately.
The second little pcb is an IBus Resler interface. I wanted to log IBus traffic with the laptop too.
OEM antenna
Edit:
Cannot find the #*% firewire cable do download the video... I will buy one on monday.