Mac the Knife : thanks for the robinson link. I have several of them on a variety of cars and although a bit wide they are great. The problem is that on my tc3, they cannot be mounted as the center part is thinner than the outer diameter, hard to explain without speaking english really good.
Lutach : thanks for the link. Can you give me your feeling about these spur gears ? I'm wondering what "acetal" means, is it a sort of nylon? How does it wear ? Otherwise that's exactly what I was looking for : narrow (and cheap). Are they machined or moulded ? I guess they're moulded, for this price...
Do they spin really really true ?
Do you think I'll be able to dye it black without softening it ?
Thanks to both of you again for your help.