Thank you both for the *extremely* useful replies--it's particularly helpful getting both the theoretical/conceptual info as well as the workflow approach on how to use MoI on these kinds of objects. Actually, just knowing that there are relatively straightforward solutions for shapes like the spout is encouraging, and the final result is much cleaner than I could get out of modo, so I'll keep playing around with the demo. Seems like there is definitely a spot in the toolbox for MoI.