A bit of a long shot, this, but ...
Does anyone happen to know whether the exorbitantly expensive Kettwiesel trailer hitch (as currently sold under the name Universal Coupling, with the Hase catalogue promise "How we love to couple you!") is compatible with the pre-aluminium steel Ketts (mine's a 2005)?
As I say, unlikely anyone will know, but probably more likely to find out here than by e-mailing Hase.
Ta.
