Don't forget that the 4.8is has a vacuum pump too and when it fails you can pretty much guarantee that your seat will look like a traffic cone...

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"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course