Thanks Mike, your comments are much appreciated.
In a remarkably short time this afternoon I did the undernose panel with less trouble than expected.
I started yesterday by laying a place of tape over the lower nose section and tracing the cut line as accurately as possible, then scanned it. The results weren't very encouraging:
but when imported into the Silhouette I managed to make the outlines look a little more respectable:
I cut the shape expecting it to be way out but, surprise surprise, it fitted well enough first time to satisfy my needs. I'd be the first to admit that it is not perfect, a little tweaking is necessary in some not-so-obvious places, but I'm pretty much calling the foiling done. Having said that, I am going to try covering the intakes on the side panels, having gained some experience with applying foil I think it's eminently doable. I've found that it's a good idea to make the foil shape slightly larger than needed, a sharp knife edge lightly passed over the foil later will trim off any excess.
So when I build my second Fury, these will be ready and waiting!