I've been reading about all the different 1/48 Spitfire kits, and in particular about the complaints about the Hasegawa Mk IX being "off" in fuselage length. I have the Tamiya Mark I, Hasegawa Mk V and IX, and the ICM IX and XVI. I compared them all, and what I seem to see is that the Hasegawa IX is a bit shorter than the ICM kit, but not a great deal, and it is longer in the nose as it should be compared to the Mk I and V kits I have. What strikes me as strange is that Hasegawa didn't seem to revisit their Mk V when they did the Mk. IX, it is a completely different fuselage, and the V seems more accurate in length from the firewall back than the IX does.
Overall, I don't think I can tell there is anything wrong with the Hasegawa IX without a ruler. Other people seem to have differing opinions, which is their due. I do think I will end up with a more pleasant result and experience with the Hasegawa kit than I will with the ICM kit, one of which I am thrashing through now as a practice for our main event.
The 1/32 K5054 project is waiting for the starting pistol, with all of the ingredients in hand. I'll be using the Paragon conversion on the newer Revell MkI/II kit. I found a French Blue Grey in Pollyscale enamel that I hope will avoid brickbats from the experts.