I've always really loved this show. This Dr. Bob stage mic recording is really good, and clean. However a problem with stage mic recordings is that sometimes the mics don't pick up vocals, keyboards, or guest musicians. This is the case here. You can tell Kang is adding a lot to the shows, but he is so low in the mix that he's tough to hear.
Regardless, I'd highly recommend this show. With Kang on violin during Five B4 Funk, he and Steve are trading licks and it almost sounds like the far out sounds of Mahavishnu Orchestra from the early 1970s... amazing stuff.
It would be interesting to hear an audience recording (not recorded from the stage), or a SBD of this show if they ever surface to see if Kang is higher in the mix.