I've done the basic lines to hold it all in place, and I've just started filling in the areas.
Here you can see an area with just the basic stitches:
and another area with the same colours with a lot more quilting:
It's good to see the 3D effect really taking shape as more lines go in.
I have just realised I have about a month to go before I need to be photographing and sending in my entry, so I better get moving now!