Thank you, Silversand, for your most comprehensive post. I will be checking all of the weak areas that you mention.
Our 2011 Apex is almost four years old now. Ours does have the composite roof. We have not had any leaking around the seal where the roof meets the sidewalls. We have had some around the Fantastic Vent Fan which is located above the stovetop. I sealed it with caulk several times, but the leak returned. About a year ago I put Eternabond Tape on the roof around the vent flange. So far, so good, it has not leaked since.
Our Outfitter is always stored outside. We live in the Florida Panhandle where rain in abundant.
Generally speaking, our outfitter has been a good companion and has worked well for us.
I am looking forward to hearing more about the experience of others with their Outfitters.
Brian