@frank Hei, I got busy during the weekend but just wanted to say thank you for this. I did keep at it and eventually did figure out why every single documented dev-procedure failed to work.
After studying the source I don't think it's possible to accomplish what I attempted by plugin alone after all, so I ended up hacking on the sources instead.
I guess time will tell how radical the modifications need to be :)
Linux geeks doing what Linux geeks do...