Created by: Lekensteyn
About solaar-cli, some options are still missing after the refactoring like --help. I do not know how much you care about that given that you deprecated it? Some stability of options would be nice. The --hidraw options was re-added for CLI use, the GUI does not support this option though (it gets ignored for now, that is probably a bug).
Nestor from Logitech was kind to provide me a T400, T650 and Anywhere MX. I have added some dumps for it after testing.