Thanks to new contributor, we have documentation of, and several options for, axis conventions in pyspacemouse 
not yet released to pypi, but please try it out (you can pip install directly from github!) and let me know what you think.
Longer term, the plan is to change the default convention to HID, because the LEGACY convention is, frankly, insane, and I don’t want all users to have to “fix it” on their own.