As far as I am aware, there was only one other singular Yeh / Olson release and that was the "Live At Kathy's B-Day" single sided LP on Rococo Records.
The Kathy in question is Lambsbread's Kathy O'Dell. This is a recording made at her birthday shindig that includes the Yeh / Olson collaboration, Mark Morgan, Death Knell, Aaron Dilloway and a few tracks that basically feature everybody in the room.
CDr released on American Tapes in 2006.
It's AM465 btw ...
Delwar Showdown