That is looking awesome monolithic. Can't wait to see your progression. I've never used Castilene before..do you need to heat it to sculpt with?
Thanks. I'll try to put up something tomorrow when I'm further along. The sort of process I use with it simplified is use a heat lamp to warm it up and it becomes like a putty, put in the general shape I want and then once it cools it gets hard enough to carve.