Pat,
another French (Swiss-french to be exact) source was the website of Gilbert Gribi, building fantastic narrow gauge models and mini-layouts (American & French prototype). He had a wealth of hints and tricks on his site. (One thing I remember was to use a CD and the center of its jewel case to construct a small turntable with a very precise bearing.)
I'm sorry to say that his website no longer exists. So far I couldn't find out, if he has a new website or not. I'll write Gilbert an e-mail (if his address still is active), and I'll keep you informed.
Ron