Errr...isn’t everyone’s collection of 10ths already quite overCooked?
(My “dream” completion would have come from the pen of the great Dmitri Shostakovich.)
My “dream” completion would have come from Mahler himself (if we are allowed to wishful thinking). Seriously, I doubt that Shostakovich could have completed it in a Mahlerian way, i.e. that it would sounded more like Shostakovich than Mahler. My $0.02.
Roffe