The menu for Marking Analysis Tools has a subset of functions designed to help with checking the results from Quick Split. One especially useful function in the Parting Analytic tools is the Mark Unassigned Faces option. This will place a green dot on any face in the work part that has yet to be assigned a pull direction. It’s a good way to check the completeness of the split and very helpful for finding small faces that may have been overlooked. This same analysis can be run from the parting tree as well. Right-click over the unassigned set in the tree and select Mark Faces.