I just heard a recital of new music by John Steinmetz. The first work was a duo for bassoons, with one playing contra on two of the four movements, and the other was a duet for oboe and bassoon. Musicians were tom Nugent on oboe, Nicolosa Kuster on bassoon and Margaret Philips on bassoon and contra. Bravi tutti to all!
I didn’t manage to get a photo after the first duet, but here’s one from after the second.