[Freesurfer] FS using uncompressed (not mgz) MRI files?

Folks -- probably Nick?

I'd like to be able to work with some FS sessions using uncompressed data, ie: not using mgz files. (Why? So that I can conveniently use some other tools for troubleshooting and inspection, tools that don't know how to uncompress mgz files).

Questions:

1. If I just try to gunzip mgz files, some of their names collide with the directories that mksubjdirs has set up. Historically, most of these dirs used to act as containers for per-slice COR files, so they don't seem useful anymore. Can they just be deleted without consequence?

2. I'm assuming that the uncompressed files should be given the extension ".mgh". Do the FS pipeline scripts and programs automatically adapt to uncompressed files?

Thanks,

Graham