K. Does this mean that by using only the L6 link cable, I could, perhaps, copy presets of my fav. amp models and add configuration to it to switch the DT to match the amp? Or do I need to do it via MIDI?
I obviously don't grok the differences between the "output routing" of the Helix vs. the HD500s, since I've never used a Helix. But to me, it wouldn't seem to be rocket surgury to have the Helix switch the amp params on a particular path to match the amp being emulated on that path, if that path's destination is a DT amp via the L6 link. But perhaps the Helix has changed things so much that it just doesn't "fit" anymore.
Also, are you saying that L6 never even tested the WDDW 4XDT configuration, or are you saying that L6 HQ is on a different planet? (harhar..couldn't resist). :p