Nice job! That circle cutter really is the business (once you master getting the tension of the spring right....).
I agree about that spring tension, Nigel. I was almost ready to take the thing back until I figured out how that worked...with no instructions it took me a bit of playing around with it to figure things out.
Continuing with my build, I knew there was a very slight "ghost seam" down the spine of the fuselage. But dealing with it was not that necessary, I had decided. It was only visible under certain lighting...but there it was staring at me. That seam grated on me for a while to the point where - always late in the game - I decided to actually do something about it. At the risk of causing more damage than I was fixing...the sandpaper and putty came out, and I tackled it as carefully as possible not to mar any of the surrounding finish & decals. Glad I did, and am continuing with the rigging. Lesson learned. Cheers!

The seam was sanded down with fine sandpaper sticks.

Taping off the area close to the seam, I laid down a couple of beads of Mr, Surfacer 1000 and let it dry for 24 hrs.

After sanding the area down with a number of fine sanding sticks, the area was repainted and rigging work continued.