How long does it take to draw each piece?
Typically 4 or 5 hours work for each piece. Not all in one sitting though, I'll just do an hour here and there when I'm in the mood.
The basic outline, the main sketch, literally takes minutes. It's colouring them that takes the time up. Layering, blending, highlighting, detailing, taking shadows and tonal variances in colour into account.
It all made me realise very quickly that my old eyes weren't up to the job, hence my new glasses. But to be honest I still struggle with the fine work. I think I'd benefit from one of those huge manoeverable magnifying glasses on a stand that model hobbyists use.