Hi Michael. I hope you don't think I'm knocking Moi in any way. I still plan on buying it for several reasons, and one of them is to get past Rhino's intersection hiccups... So I pasted your test object into a Rhino file in mm units. And yes it did fail. Then i raised my tolerance to .01 and it worked. So i am curious what is the default tolerance of Moi ?

jonah