I think I know what I want now.

As per your comment: "it's not necessarily accurate to conclude that the F2(frictionless)-F2(friction) is necessarily due to friction at node 2, but rather friction interplay between nodes 1 and 2"

What I want to see is the friction interplay from other supports on the considering support. This helps to identify whether friction or thermal is the dominant effect when looking at a guide/stopper force

The title of this post should be: Splitting the pure thermal force and Friction interplay

Let me know if any comments/misunderstanding