I think it took me around 2 days to complete and polish the mesh, because it took me a lot of time to change proportions several times, and I tried to do my best at unwrapping it, so A.R. would have an easy time working on it, but I don't know how long A.R. and Terrasque worked on it.
As for other treasures, I don't know what others we have available, I've had at least two HD crashes since I've been working on the project, and Archian has lost the most or all the stuff at least once, so I am not sure what's left around. This one was a lucky shot because Terrasque had it on some old USB drive, else it'd probably be lost as well!