Hi Chris,
Where are you stuck ?
I guess you are trying to make a self-join of the resulting table with itself in a repeat loop
In such a case you'll get an exploration of your graph that will change the"starting point" of your exploration on each step of the loop
One trick can be to export the base table and to make the join of your resulting table with this base table in each loop.
In this case the repeat action will behave like a "with recursive" SQL query.
Maybe have a look at this post
and to the join file "EM repeat with table.zip" in the post
Regard