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Hisashi Yamamoto thinks at least 0:19 - end is Sugiura. Based on some of their other claims and Sugiura's other work around this time I have doubts they're right.

デンドロの爆導索とガーベラを砲身で貫く所は杉浦さん
https://twitter.com/Lunamoon55/status/1330504505058861059