Thanks everyone. It's always great to get nice feedback.
Hi Ian. I don't think there's much wrong with the Hasegawa kit. If I were to build another Hasegawa P-51, I would definitely replace the wheelwells and canopy. The seat also definitely needs replacing but the rest of the cockpit isn't bad. I made a few big errors when I first built it (I.e. Ruined the wheels, canopy, paint, decals, etc...):
And then a few niggling little ones when I was doing the re-paint (I.e. Not enough black paint in the cockpit, stuffed up the wheels, canopy, paint decals, etc... I really just need to be more careful)
I now have a replacement Canopy, which I may still install. The next Mustang I build will be the old Monogram one (with half a Kilo of resin AM) and then, hopefully, one from a different Japanese company.
Once I have another in the cabinet, I might just "Donate" this one to the Museum.