The windvane on the Obi looks to be based on Chen's version from years ago - the angle at the base of the blades and blade thicknesses.
There seems to be a thicker area beyond the ring of holes, leading up to the emitter face, and the frag body's grooves seem very shallow and narrow.
I would've put a crystal in the emitter as it's very plain in there for an 'Extreme' edition.
There are a few other areas I'd tweak - the gap between the endcap and the pommel edge while accurate to the found part, looks strange considering all other Obi saber featuring this pommel design do not have that gap. A flush fit would have suited better I think.
On the whole I think the Obi looks really interesting, but it kinda points to the belief Lucasfilm doesn't have any more reference material than we do.:cry
I like the way they've made the interior mechanisms smaller as they run through the clamp, but I would like to have seem metal in there.
It would have been good to see a few lenses in there, even if they were just plastic - as these things (the way I see them, anyhow) focus light and energy.
It just doesn't look, well 'Star Wars' to me - it's a modern toy interior and too generic, and it doesn't complement the sheer beauty of the design we all know so well and love.
But hey - everyone has their own take on things. I guess this is what George likes.
The X looks really spot on - although I'm no SS expert.
Just wish they'd make these available unpainted like the proto in the pics.