Found a strange issue with matplotlib across platforms where by the plt.grid() on Ubuntu BBB only shows Y axis lines as default but Minibian shows both.  Have set to Y axis only.   Removed unwanted nohup file.  Commented out fif.clf() as not needed.  Adding padding to tight_layout as again it's not consistent across platforms.
Updated Readme to included info about minibian.
Updated Readme and reverted some of the changes made to combined.py which weren't in fact needed.