Yes Scott, I have tried that on the T4 I had for a while...nowhere near as flexible, or quick imo....it was not as intuitive, as easy, flexible or quick as using a dedicated chart organising app as UB....and it required more pre-configuring as well...
Overall I found it was WAY more clunky on the T4 and nowhere near as quick and easy...Also really difficult to run on a setlist (playlist) basis...
I know this works REALLY well for me is rock solid and requires very VERY little preparation, especially with the PAsCo app....I can have a chart linked and ready to go in about 30 seconds!!
And I get 10 hours use on battery from the iPad

With careful use...ie putting the iPad ionto standby between sets, or when not needed, I can get just on three gigs (my gigs are 3-4 hours)from one full battery charge.
My UB list is at about 600 songs, so I have a LONG way to go to reach 9,999
Dennis