Top of cabin.  I did not install the seatbelts until after painting. (oops).

You have to countersink this screw.  The head is wider than any of my countersinks, so I used the countersink and then very slowly used a 1/2 round file to file the lip (1/16 in) wider.  If I had the proper tool it would have been 5 min.  Took 2 hrs instead.

Nothing else of interest installing the seatbelts.