Someone ask me that :)

1. Which tolerance are you using? Its the tolerance customizable?
2. Its possible to make solids?
3. About the curves. Which degrees for the curves its possible to use? Is also possible to switch from a 4 degree curve to a 7 or 9 degree curve just typing the degree?
4. About the Surfaces. Its possible to manipulate the surfaces to correct the desired shape?
5. Its possible to make free form surfaces, i guess its possible, well if i want to make a surfaces and connect to another which tangential will be obtain?
6. Do you have a zebra shading to analyse the continuty of the surfaces?