While a more even glaze was expected, this result is interesting. Now I wonder what the likelihood of duplicating it is? :-)
The size came out a little under the target, so the shrinkage adjustment will be refined (one reason for the test).
Final size: 5.5 inches (14.0 cm) square by about 0.35 (0.9 cm) thick (excluding carved image).
To the good, the tile is flatter now than after the bisque firing.