For Lord Krishna's Stencil I used the stencil tool http://www.thingiverse.com/thing:55821 and printed with small size, which was not good, I have uploaded a file, in which we can set the size, I am yet to print in big size. Let me know if you print it.I used this for smaller print in Slic3r, output was not good, may be due to smaller size of the print layer_height = 0.15 perimeters = 2 top_solid_layers = 7 bottom_solid_layers = 7 fill_density = 0.5