I don't know why this was so hard to do, after the fact I realize that it was not a big deal to take care of.
A couple of weeks ago I notice that the left side galley wall had developed a rather nasty warp. It bowed a full 1/4 inch out of line with the rest of the trailer side, and would make a properly fitting hatch nearly impossible to build. Several people suggested interior braces, exterior braces, and the like. I decided the only right way to fix it was to section out the warp and replace it with better wood. I must tell you that making that cut after all the hard work I have done so far was not easy. It felt like I was tearing it apart. Or moving backward. I don't know. Just psychological, really. The actual repair was pretty simple.
I could not get a good picture of the warp, but did post some of the repair. Also, there are some new general progress pics.
Phil