I have 3 WSM's. Had the same problem with large briskets. Rolling under the beginning of the point didn't hurt the brisket any, straightening it out as it cooked with the WSM, I don't see why it would hurt the finished product in your CS either.
Just an opinion. I have a 150 and I haven't had to roll a brisket in it yet, The big ones are a tight fit though.
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