On a wider level- if there is interest- the site admins might want to create a "Cross References" category, where cross reference issues / relationships could be discussed.
I like it. Would each thread be limited to relationship pairs or even broader?
Bagger
We would need to restrict discussions to the specific Relationship. Otherwise, we might just as well use the TGM Basic and Advanced Forums already in place. However, I do not think that we necessarily need to restrict the Relationships to pairs. In the Extensor Action / Rhythm pair I offered as an example, a third relationship to the #3 Power Accumulator (6-B-3-0) is virtually unavoidable. Of course, the Rhythm of the #3 Accumulator is...guess what?...Hinge Action (2-G). And there you go...