Problem I have with the Little Giant version, Nate, aside from the only-two-leg extension, is the 40-pound weight and 28-inch footprint. I could find no specs for the German ladder, but at least it doesn't have the extra extension ladder addition and should be substantially lighter. Extension ladders I have; it's only the stepladder I want.
I agree about the clamping system on the German model, but I keep thinking they're just not describing it sufficiently. Or maybe it really sucks. Gonna cost three or four hunnert bucks (at least) to find out and I bet they don't pay for return shipping, eh?
Once upon a time I knew more than one, Paul, but not sure any of'em likely me enough to go ladder shopping in Germany on my behalf.

I don't see a brick and mortar outlet for them, anyway.