Foren / Cotonti / Skins / Skins for Siena

Hello guys,

I want to convert some tempaltes in new skins themes.
If I start , I want to do it for Siena. Not for Genoa.

Is the skin delivered in Siena Alpha reliable to use to convert a skin theme?
Or is there another version I better use?

Pls let me know.
If there is a template someone wants to be converted. Let me know.