Gustaf Sjökvist's Chamber Choir (Gustaf Sjökvists Kammarkör (GSKK)) had their 20th anniversary concert at Eric Ericssonhallen (former church of Skeppsholmen) with Benny as one of the guests. 

The choir has recorded an album with Benny's music at Riksmixningsverket studio - yet to be released at that moment in time.

There was footage of Benny rehearsing with Gustaf Sjökvist but I cannot find a source for it, nor can I find the footage.

Thanks to Pentti Koponen and Pascale Ranson.