Sculpt?

[salt サルト]

I tried sculpting and this is my first model (only testing)
http://oi60.tinypic.com/sp7q1j.jpg
I sculpt using Sculptris, so the question is:
1. Any method/ concept to make a sharp edge (blade edge, hilt to blade part) ?
2. Is it a good sculpt ?
3. Is it possible to make double symetry? ( sculpt one side, 3 other sides affected )

[Akaize]

I can't open the link. But I'wll tell u how I do this kind of thing.

1- model a low poly model, with +- the shape that you like to model.
2- use the mult surface modifier to increase the model polygons, and sculpt this, increase again and sculpt more. Don't pass 5 subdivisions in this modifier, to safe your performance.