I couldn't help myself from doing a little more to this so here's an update.
Headlight lens - The first pic is a dry fit as they are, look pretty appaling don't they? There isn't much give for the lens to be sanded so i've opted to sit the headlights lower down. The second pic shows yet more 10thou card added to the underside of the hood, where the tab on the headlights is to be glued. This is one layer, I added 2 in the end.
The final result looks alot more pleasing in the third pic even though the headlights are not 100% accurate by sitting a little lower, but i guess that can't be helped. These will eventually look great with the help of some CF decal.
