Suceeded downgrading n3dsJ from 10.3 to 9.1, overcoming "failed to get CIA file info" by:
1. Ensure all 100 (only!) cia files for n3dsJ pass safesyupdator check.
2. turn on wifi before shutting down and then booting hbl.
3. enter ftpony, then press "B" TWICE to exit.
4. enter sysupdater, HOLD "Y" for 3 seconds once red text appears.