It's not improbable but it is unlikely I'd say. While they are likely to exist somewhere - we do not know where (in every case) nor do we know if what state they are in. Also, if collectors were going to release these then they probably would have done by now.

However, while their relative ...

Given that I'd like to have all the soundboards available (please FTD more sounboards in a year) are these tours impossible dream?
-november 71
-june/november 72
-april/june 73
-july 75
-lake tahoe may 76

Thanks for this new forum.
There aren't sounbords from Greensboro, Detroit, Saginaw 25.4 and Green Bay?
If think vol. 4: 2 shows from Chicago and Saginaw 3.5