Wow, Tea, that 1-12-79 is an interesting listen. I was unfamiliar as well with this show. For a '79 show without a soundboard source, this Jim Wise FOB with Sony mics holds its own nicely.
And yes, the evening is all about the Dancin' and the NFA, both of which are stunning. Unfortunately during the final GDTRFB jam Bobby is way too loud in the mix, and he kills what would perhaps have been a huge Jerry scrub. The set list here could make one look the other way but that would be a mistake.