Personally, it's never even been an issue with my sim-play. I always open my tubes long before the DDs are even close enough to hear it (if that's even possible for them in-game). I can open them fast enough using the W & Q keys. Never needed to open them all up simultaneously.
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" The journey of a thousand miles begins with a single step."
-Miyamoto Musashi
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" What is truth?"
-Pontius Pilate
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