Let me clarify what I wrote. The master has a styrene bottom, but there is no indication that any other X-wings (hero or pyro) had styrene fuselage halves. Dave left me with the impression that this 'master' was reworked with styrene to accommodate the changes and that subsequent pulls were all resin.
Sorry, I wasn't suggesting that you had claimed that the X-wings had styrene fuselage halves, it was my own crazy idea.
I'm not pooh-poohing the idea that this is the original pattern for all of the X-wings, but as Beaz has pointed out, if it was, then it would have had to be heavily modified to be in its current state. The "hero" fuselages were moulded without any part of the nose-block attached whereas this piece has the nose-block fixed on. It also appears to be the case that each of the "hero" models had their torpedo tubes added after the bottom halves were formed.
I can't see anything about this piece that suggests that it
isn't the original pattern re-worked, but it strikes me that the same end result could be attained by cutting up an assembled "hero" fuselage", and if the "hero" fuselage bottoms were resin, that would be somewhat easier to do than working with the original styrene pattern.
The only high-resolution pictures that I have (apart from a handful that were passed on to me before I completely swore off the sub rosa nonsense) are Uwe Fischer's pictures of Red Two (which are available to anybody - see the email link at the bottom of
this webpage), and while I don't see anything that proves that Red Two had a styrene bottom, the wall thickness of the bottom half suggests that it's possible that it did.
Also, in the picture that Jason posted:
notice how the X-wing in the background has a white bottom half, even though nothing else on the model appears to have been painted white yet (all of the other white parts are known - or at least believed - to be either kit parts or styrene sheet).