Thanks for the offer Butcher - I've got quite a lot of resources, but I'll message you once I've settled on the skins to do and see if you have anything more, if that's okay?
and thanks to The Fugitive; it seems i missed a few things when catching up on the forums! That's big news. I've also just seen the post about bump-mapping as well, which is a complete game changer!
I've looked at some D paintschemes, problem is they tend to either be versions that are tropicalised, or ones with the centre bombrack, and they've all got the plate glass windscreen, quite big differences to the C-5 model we have. By the time you get to E machine pictured in the med, they've got the cooling air intake on the nose as well (the twin MGs seem to be an aircraft mod), the F-trop behind has an air filter on the wing, rounded spinners and a different engine air intake.
I think there will be enough purely C schemes to make it worth while. There were several major changes of official camouflage during 1940 alone, not to mention geschwader level differences. I've also got shots of C models based in Malta, Russia and North Africa which should be good enough to make up skins from.
I'm mostly done on panel lines, just the tail to do, then rivets, other detail, etc. I couldn't resist putting some paint on it just to get an idea how it's shaping up:

obviously that's not actually a paintscheme, just more pleasing than looking at than a white model. It also serves to hide some of the dodgy smoothing on the original polys:

The various elements met up better than I thought they would, not too much miss-match in panel lines, bodes well for matching up weathering/smoke/etc across the divides:

Had to chuck it in the game a few times to find the slats. Also thought it was worth checking to see how different it looks to the viewer.

Spotted a panel by the wing radiator that i'd missed. There are precious few reference points in that part of the skin, so I put down a scattering of dots to help me find it in the viewer. Just occasionally it's great having a screen large enough to see a few things at once:

Correctly located, doesn't look like much now, but at least I know where it is:

Probably not get anything done now for a few days, but it gets a lot easier from now on in.