I can't honestly say that I've given it much of a go with the 11mm, I just gave it a quick try with the open end, noticed it was slipping slightly so didn't continue.
Yeah the Konigsport's came with Koni adjusters, mate asked me if they were Koni's because of that so I'm guessing they're made in the same place and just re-labelled, packaged and sold under a different name.
You have the same ones veedubgti16v? What settings have you gone for with the dampers?