I found the offending code that makes the Libre --> jetBook flash fail:
Code:
if [ -e $TMP_SD/data/JL09 ] ; then
echo "Is JL09"
else
echo "Is not JL09"
killall -9 flashing.sh
Error_Firmware
fi
All one needs to do is create a file called "JL09" in the jetBook firmware to allow a flashback. I may experiment with it later, but for now the Libre firmware is fine. If I do flash back later, I'll post modified firmware for both directions.