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I've done all of the above myself in my cab and it took about an hour and a half the first time with the roll bar with an extra pair of hands and about three hours of roll bar seats and harnesses by myself. In the future, I imagine I could do it all in less than two hours. Ten hours is a bend over estimate.
I'm heading to the track for the first time and Shenandoah circuit at Summit Point apparently has a little crest where some people catch air. I don't want the rollover bars to scare the crap out of me while on the track. Any ideas?