I think that there's TOO MUCH percussion added to the climactic passage in the first movement. This sort of, "shoots one's wad" (so to speak), as it somewhat diminishes the impact of adding percussion to the reprise of the same climax in the fifth movement. David thinks that there should be zero percussion added to the first movement - anywhere. I'm willing to concede a mezzoforte tam-tam stroke at the start of the loud outburst, with only a discrete bass drum roll added into the few meaures that precede the four-bar passage that has the upper strings playing pizzicato notes (followed by the dissonant climax). In my opinion, no percussion should be added during the dissonant part itself (save it for the finale).
