There is a thread here at AF. I think it's called "RePak" or something like that.
I don't believe it's had much activity in quite a while...
I might pick that project up again at a later time - otherwise: The full schematics were printed in the c't magazine and the article can be bought online. High quality scans are available ... so everything I had when I started the reverse engineering.
I'm currently in the prototyping phase of another project (with the series run being done some time this year if all goes well) - so 2018 ... maybe as I still have the old layouts that remained untouched since december 2013.http://i.imgur.com/4bSOIAa.jpg