It depends. The more experienced I get, the faster I get through the same amount of work (not having to figure out techniques makes it go a lot faster). For instance the S'pht was my first one, and that probably took 16 hours, whereas the M-77 Paladin probably took 8-10 hours, the KKV-7 took around 3 hours, and [url=http://i39.photobucket.com/albums/e183/Silentone2/Foundperspective.png]The Tain[/url] (most of which was spent figuring out how to make eldritch geometry appear to exist in 3D space).