Got up early this morning and made the first cut. Start by drilling #30 holes around the curved portions, then used a Dremel cut-off wheel to cut the straight parts. Then used a small sanding drum on the Dremel to clean up the curves and remove excess from the straight cuts - probably could have cut a lot closer to the line with the cut-off wheel. Then a combination of straight file and sandpaper wrapped around a kid's drinking cup that happens to be about the radius.
Not too bad. I did get a gouge in the top skin from a cutoff wheel that jumped. I sanded that out and scotchbrited it out - might need a little more.
Proceeding with the upper lower mounting strips for the left wing. Pretty straightforward, just follow the instructions. There is one point when they say to put slight bend in the retainer plate. Was sure if they meant to bend it outward for more space or bend it inward to compensate for the tendency of a single row of rivets to bend it outward. I went with the latter - hopefully it's not too tight.
Got the lower strips done which are similar except they use #6 screw to hold everything in place.
Repeat everything for right side.
Left side - 3.5 hrs
Right side - 1.5