Ive got 2 TT530's. The use daily unit is running the good old faithfull 8398 Navcore & the Backup is running 9701 Navcore. After playing with the backup today Ive decided i'd prefer to wipe the sd card and reinstall 8398 to my Backup. However, since updating to 9701 i've swapped my computer and I cant seem to locate 8398 on any of my backups. My question is "if I copy the sd card from my TT530 daily user 8398 on to a blank SD & then remove ttgo.bif. insert it into the backup and then use easy activater to patch" ive probably got that all wrong so if that is not fees-able . can someone post me a link to the 8398 Navcore.