The footage of them rehearsing in the Manticore Documentary (early 1973) shows him using a Ludwig kit:
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I think the collapse of the stage due to the weight of the kit, bells, timps, gongs and the rotating stand it was all on (2.5 tons) was in Liverpool, late April 1974, the stage at the Empire Theater couldn't support it. Wouldn't be surprised if it happened other places too.
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