Stay tuned for more A5 firmware updates, we are actively working to get this open source. Currently working on getting the filament sensor to unload and load as expected.
I love feedback and collaboration, so please feel free to help it along!
EDIT: We've released a solid firmware. See link above.
***NOTE: Please make sure to have a backup of your firmware (or JG's original HEX file) before proceeding with this. I take no responsibility for errors or issues, though I am here to help if I can. :)