It might be. There were plans for the Dark Eldar dio to go on display there for a bit but they never came off, so we'll have to see.
I'll just have to somehow I make it to the GD and see it there for myself then.
250 hours is an incredible amount of dedication to this. That's like 6 weeks work at a normal job. It looks phenomial though, stunning work, can't wait to see it based.
As I've not seen this in real life it's difficult to tell what the colours are vs what your camera and my screen is letting me see. A grey card is definitely helpful to get the balance right and setting the white balance in camera is really important. I don't know what model of camera you're using but it might be worth playing with the actual colour temperature ( Kelvin ) if you have that setting. If not I'd alternate through the others. Try the dull day setting, it seems to capture things more accurately sometimes ? However if you're using studio lights or flash it should be able to balance to them properly, if not you can with software. Especially if the first image you shoot has the grey card in it. If you have lightroom or Capture one or Hasselblad's free to download "Phocus" software you can balance it in them which is different to doing it in photoshop. The photoshop raw settings are good, even if you're not shooting raw it will open up supported Jpegs and the like and really sort it out, you get a whole load of extra controls to play with.
When I've done coloured products for work though the settings I'll need to get a red product accurately have to be changed drastically to make blue or green correct, the fact you have all of these and more in one picture is a challenge for any camera. The only way to get that absolutely perfect is take all of your pictures then do an extensive amount of masking and colour correcting in photoshop for each and every picture balancing out the tones.
If you get stuck drop me a PM I'm happy to offer what advice I can.