On the second wing panel I decided to just drill out the servo screw holes a little larger. The 1/16" drill bit dropped into the hole, so I drilled all four holes with a 5/64" bit in the little hand drill.
I put the screws in all four holes without the servo. It's a little easier to put them in the first time without the servo. Once they're in once, they're easier to reinstall.
The hole for the servo needed a little trim in one corner. It was easy with the hatch. 