Hi Tommy, thanks for letting me know what is going on. It sounds like what you really want is to get the actual NURBS data into XSI. But yeah they need to do some updates to their NURBS code to make that work right, it seems like that part of XSI has been on the shelf and untouched for a long time now.

> (or could MoI get an inverse-option of the command where
> it optimizes planes to be closer to their trimming? Un-fit with
> an offset?

That is possible to do in theory... Kind of extend the surface in all directions but keep the trim curve region the same. But it would take some work to set it up, I don't have anything all ready to go that handles all the details of it right now.

- Michael