Selecting edges, verts. etc. from Tsplines <-> Grasshopper

Hi, if you are a proud owner of Tsplines 4.0 for Rhino, you are aware of the stunning lack of documentation about its Grasshopper components. When Autodesk bought Tsplines they crowded all the Rhino users in a lifeboat and cast them adrift with two days' provisions and a three minute youtube video. Oh, and may we interest you in Fusion 360?

OK, now that I've gotten that out of my system...

I know this is a longshot but is anyone aware of a way to select, say an edge loop in a tspline object and have that edge information brought into a tspline GH component? I can see how converting the tsplines into a mesh and then using Sandbox, for example, can allow you to specify edges but it would seem to defeat the purpose. Thanks.