Connor, I'd be happy to. But If you're waiting on me it's going to be a minute; I'm just in the planning phases. But I'll brainstorm it off the top of my head if you'll play along. (Not insulting anyone's inteligence on HERMS; just annotating everything to visualize the details.)
Beer runs out of the still to a pump, out to a HERMS coil (Basically a worm used for heating) in your brew kettle with a boiling water bath. Beer then departs the HERMS heading back to your still after exchaning heat with the boiling water in the BK.
Fittings required would be two on your still, two on your BK, and however you connect your HERMS coil inside. I know that tri-clamps are the most popular; but I'll probably rely on stainless camlocks, NTP connections, and compression fittings for the coil/BK (my BK will be stainless).
I think the two main worries on this technique would be:
-Whether or not your pump can handle the beer mixture
-Whether or not you can get enough surface area on the HERMS coil (diameter and lengeth of the pipe) to exchange enough heat for it to bring your beer to temp in a reasonable amount of time.?
Depending on the still you could run your HERMS coil into it and only circulate the boiling water alleviating the pump issue. I think this method would be a less efficient concept though.
Most distillers could probably work this up for experimentation with your current equipment (shot in the dark) for the cost of the HERMS coil and fittings. A counterflow "chiller" would work better but I've never seen one large enough for the application. You'd also need two pumps.
Here's a video of a tri-clamp HERMS home brewery (not mine) for reference. I hope this helps you or someone else out. Like I said, throw rocks. I'm the new guy here.