Thought I'd let other people know that have enjoyed the High Definition and Lexham Discourse resources as much as I have that there is a new group on Faithlife that I think could be very promising and a great place to interact about discourse grammar and these resources.
Dr. Runge has been interacting a lot with users and even answered a question that I posted with a screen cast. (I personally think this is awesome!)
Check it out!
https://faithlife.com/highdef/activity
Here is the question and the screen cast video in response!
https://faithlife.com/comments/326283
https://www.youtube.com/watch?v=vPCoytu7HeU