Nice work Ian, your propeller is looking very good. Saw these on a quick search
http://www.shapeways.com/product/3WFEZWGNY/1-144-wwi-pilots
Thanks Joe I've had a look at there site, and there's a great range to look at.
And with a link to a post by Graham about modeling we were talking about 3D printing in modeling and this is the way it's going to be.