Hi jonah,

>>It is a legitimate problem.

It sounds like Modo is a pain on this point.
Can a 3rd party mapper, such as UV-mapper help? http://www.uvmapper.com/ (there is a free version)

Thanks for the suggestion. But I'd rather not have to do any mapping at all. In that case, I'd rather just export from Rhino. Let's see what can be resolved using software which I already use... Modo actually has some nice UV tools, but missing something to handle a "revolved" disc...

jonah