[C Johnson]

then i looked at my trailer a little closer, and it SEEMS like when i take out all the rivets at the bottom of the shell, top of the belly pan, the channel that supports the base of the wall comes out. now this opens up another option for me. can i drop that channel, and fasten it to the sub-floor, and THEN drop the shell over the channel and rivet it back on?

Now your catching on !