Another one - I think my surface is too complex for MoI to work with easily. I can't extrude it. I've tried two ways to get it into MoI - use the obj to 3DM converter and the obj import in V4.

Here is the file:

https://www.dropbox.com/s/53srfylmixf1zay/SurfTest.3dm?dl=1

Is there a way to simplify it to an approximation so there are less facets?

Thanks, Andy