Three things needed resolution:
- The servo is a really tight fit in the access hole. (WHY? another 1/8" clearance would have been wonderful and would not cause structural issues.) The edges of the nutplates needed to be filed down so that they did not protrude into the opening.
- In a similar manner the edges of the access opening needed to be relieved near the throat, because the clevis pin on the servo was binding on the edge of the opening.
- Finally, one corner of the servo was hard to insert into the hole. So I drilled a new hole and installed a rivet there. That made room to relieve the corner, as shown in the photo below.
Total Time: 1.5 Hours