"Roger" wrote

Just finished redoing the leading edge of the one elevator
shell...again!. Looks pretty good this time. Now I need to figure out
how to set up a small router to cut out the hinge access points so
they look good.

I would use a jig, and a router bit to follow the jig. Make a big letter
"O", of whatever size and shape you need, tape it to the surface, and let
the non cutting surface of the bit follow around the inside of the template,
using rotation to force it to the template. I hope this is clear enough.
--
Jim in NC