I'm seeing Alex on Saturday, we're driving down to Hobart with Barry for the BGRC event, so I'll talk to him about the mounts then. I'm exchanging emails with Graeme too, so together we should be able to work out what to order... I'm guessing Merkel has changed a couple of dimensions so that you can only order the rings through them.... but we'll see.

UPDATE: After sending several measurements to Graeme, we now have a set of Recknagel rings ordered, and hopefully on their way to me soon.