Quote Originally Posted by M250cnc View Post
Jonathan i have never heard anyone call a prism cylindrical before. :lol:

I would have tried rolling them on two pieces of perspex but as i made them for a customer i can't really get them all scratched can i.

They are on a thick towel as i was using a glass table and didn't want to explain to her indoors about any accidents. :whistling:

Phil
Nor have I heard anyone call a solid of constant width a cylinder, but nevermind - I should have chosen a better word!

They must be aluminum then if there's a risk of getting them scratched.

Still thinking ...