Trudy,
I too had the threaded stems punture the carton. Fortunately for me, there was no damage to anything.
It is interesting to read that Billy finds the original captain seats uncomfortable. I recall someone else saying the same, but for us, we find the earlier style ones in our 2007 to be "Very" comfortable.
BTW: Sorry, but I do have something in the brew...... As Billy is creating with a fence post, I bought a storage tube to store a sewer hose. But mine is made for the application with mounting brackets. $25 for the thing, but shipping was $35. I didn't want to share until after I mounted it. I wanted a backup to the maserator pump, in-case the pump gives trouble during a trip, and also for an extended stay where we'd want something that drains the waste as we create it.