AS the tool presently works you can only define one line per kit. I realize multiple lines of descent per kit complicate the logic model, but what if you for the time being allow us to define a “default line” plus an optional line with a switch to let us toggle the assignment for display purposes in the fan, clusters, and triangles.
Ideally, the lines of descent eould belong to triangulated relationship x gedkit in a more robust way, but the option in the meantime would support using the "experimental’ tools for user “experiments” in color coding.