That sounds good, Jim ... A jazz sax player friend of mine uses 'unReal book' and loves how he can change keys, tempo, even rhythm - Bossa to Swing etc.
The Pro 12 with Mobile Sheets Pro can also be used as a 'master' to keep others literally 'on the same page' as clients ...
I purchased a second Pro 12 for back up and when I make changes or updates on the master it takes about 10 seconds to update the back up ...
Great stuff ...