Hi Michael - my other choice for a 3D package was Cinema4D, but from this thread: http://moi3d.com/forum/lmessages.php?webtag=MOI&msg=3869.65 it looks like n-gon output doesn't work either. Do you know of any 3D package that can actually render non co-planer n-gons correctly? If so you can please let me know the names and I'll download the demos and give them a go. I am guessing none of them will do a proper job on even basic geometry with n-gons like the knob I've done, let alone something actually complicated.

I noticed that Modo has now (as of 601) got a CAD Importer package that supports IGES and other nurbs type input formats. I'll also try to give that a go and see if it can generate better geometry than MOI, and if so I'll export to IGES and import using the Modo converter. Shame though since your product is half the price of the converter alone. I'd rather give you the extra money for a better n-gon exporter than to Siemens PLM Software:

A quote from the page: http://www.luxology.com/store/CAD_Loaders_for_modo/index.aspx

“The CAD Loaders for modo are an awesome addition to my workflow. The quad-based import option is an outstanding improvement. Eliminating triangles from my imported geometry results in an asset that is easier to work with and occupies a smaller memory footprint. In addition, the wide variety of CAD formats is a huge plus.”
– Paul McCrorey