Hi Ronin,
Hmm, to be honest I am a slightly bit confused. One on hand you mention you haven't noticed any issues when you plugged your Model D into your Eurorack on the other hand at the end you are stating that they went with the original specs and that would be 1V/Hertz, isn't it? But wouldn't that cause some issues within the Eurorack?
-- GarfieldModular
In the very last paragraph I referred to the "ARP." Sorry about that. I meant the MS20 and was referring back to the Behringer K2 and its design. Sorry about that. The last paragraph was exclusively about the Behringer K2.
I don't think you should worry about the Model D being Eurorack compatible. Here's a little video of a Korg SQ1, driving a Model D via CV. (it's not my video)
Oh and DivKid, doing his thing with the Model D via CV... I think he'd mention an issue.