I added one thin washer per drawings. I had initially installed it but then it got missed during final assembly. The FAR inspector noticed it was missing, but of little consequence. It is a washer that accommodates the slight offset of the vertical fin. This is part of the fin offset to counter act P-factor.
Then I also added a hole with plexiglass cover on one of the covers by the push rod connection to elevator. I've seen this on other RVs It is an important bolt that I decided I'd like to be able to see on a normal, quick walk around inspection. It requires a flash light to look in here, but now I can see the bolt everyday.