I'm a Hurricane fan too and also think it was absolutely beautiful. Furthermore, it was more important than the Spitfire in those dark days of 1940 and was responsible for sending the most NAZI bombers down in flames.
I've built the Hasegawa version, but I never knew Hobbycraft made one. I'll be watching your progress. So far it looks great I love the subject matter.
Your dihedral looks fine to me. I concur with Nathan, it really didn't have any. I'm glad you decided to build for you on this one. Thats what I do.....alot less stress...lol.
Interesting on the exhausts, but I would imagine any paint, no matter how thick, would eventually burn off. I usually just spray my exhausts XF-64 Red Brown then lightly dry brush them silver to simulate the metal...
Joe