Thank you Anna, makes sense. I think the reason the F1 helmets are used is because they are easy to produce, once you start getting fine detail then the molding process becomes more complex. Adding complexity tends to add weight, so that is what I think is behind the F1 design for model aircraft. Of course I think I can have both, nice detail and light weight! We shall see!

Thanks for the link, and your web site is nice.

Dion