I scrapped the third iPad tonight... just looking for a pond to see how far it will skim across it before dropping out of sight forever... lol. It means I am going back to using my trusted A4 folders with paper lyrics on a music stand.
Started all over again, aiming to put all 33 hours of music on 2 iPads for my shows and rehearsals. Got those 2 iPads back to about 80% of what I need, so not anxious about making the next show at least, but that was my worst day in 16 years of preparing my music for public performance.
Still have all the EQ and sound balance to check again, but at least I sorted the backup issue on iCloud, and double backed it on iPad, then triple backed it on an iMac for good measure... lol. Onward and upward as they say.