I'm still plugging away, firing more and more glass strips. I laid out all the ones I'd done so far this morning.
It's getting there, but not quite what I want yet. I lined them all up a bit better and added the prints for the next sets of strips to the end and it began to look a bit more like it...
Laying the strips nice and straight rather than a bit haphazard made quite a difference; it's something I'm going to have to take into consideration when I'm fixing them all together.
(Apologies for the poor photographs, it's not easy to find the space to lay them all out, impossible to find somewhere with good lighting as well!)