Hi Chase, I think the problematic stuff are a couple of surfaces with squashed together control points near their ends, like this one here:





Instead of that you'd want something more like a larger trimmed plane for this whole area here:



The surface/surface intersector does not seem to be getting a very good intersection on that one, it's stopping just a little bit before it hits the edge:





But it's kind of an odd surface because it's flat yet it has a lot of internal twisting within it.

it can be better for stuff like this to be a trimmed out portion of a larger more relaxed surface rather than one patched in by being directly constructed to an non 4 sided boundary.

- Michael