[Freesurfer] How to make surface cuts / flatmaps. Alternative for tksurfer in 2020?

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How do people create flatmaps these days? It's getting more and more of a hassle to work with tksurfer (won't work on 64bit only Mac, throws tcl & tix errors on Linux in Freesurfer 7). I'm currently running tksurfer on Linux in FS6, that I basically only keep around for that purpose. I read on the mailing list that tkmedit and tksurfer are pretty much deprecated, but I've looked in Freeview and can't find a way to make cuts there. I must be missing something?

Is there some other way of doing it? Should I dive into pycortex' Blender based approach? What are the options in 2020?

Best, Chris