Matt, I'm not just saying this to please you, but that is brilliant!
If the pilot and other parts that have been painted on the sprues are anything to go by, this model is going to turn out very well indeed. I've been modelling 'seriously' from the age of 10, and your boy is way ahead of how I was then. The only thing I would offer is, leave the painting of the fudelage and wings until after they've been assembled, not that it's a big deal. But, that way, if any glue should leech from the joints and spoil the paintwork, it will prevent having to start over, and also prevent possible discouragement.
Please give my congratulations to your lad for a job very well done!
Terry.