Wow - thanks everybody - I think that I'm possibly blushing...
As I've probably said before, my only real attribute is patience, and the ability to cut out a reasonably accurate shape - and a lot of you out there appear to be much better scrollers than me. So I guess that all I've done that nobody else tends to do is take lots of separate shapes and put them together into a much bigger whole.
I have no formal training in anything remotely academic. I spent 12 years in the RAF as an armourer - traditionally thought of as the knuckle dragging low brain power aircraft trade - and for the past 15 years I've worked in a very busy photography shop, strapped to a computer, editing photos of dogs, cats, babies and family holidays each and every day. Yay.
So everything I build I build because the subjects are a little on the unusual side and nobody told me that they weren't possible with hand cut scroll saw gears, and when they did tell me that what I was trying wasn't really possible I was just too stubborn (and possibly obsessed in the case of the Antikythera Mechanism!) to listen, so did it anyway.
Go on folks - buy a clock plan - cut some gears. You may find that it's easier than you think! Go on AES, I dare you - it certainly beats stamp collecting!
Happy scrolling folks. Another update soon.