Mahler Ten, for starters: the various versions, and the recordings of those versions. And the principle of preparing a ‘performing’ version. How, given the evidence that we have, does the work fit into the Mahler Canon? Is it by now well established, or are there any of you out there who still have doubts? And Bruckner 9, that jagged, harmonically audacious set of finale ‘fragments’ whether played as is, or in the context of a ‘completion’. Schubert 7/8, too … all very different ‘cases’, but interesting topics to pursue.