from Steph3D


C4D don't manage Nurbs : it has "Hyper Nurbs" but it is absolutly not "Nurbs"
Obj format is a real enigma : it manages Ngones but not on all object!!! :(
Quadrangles are very well manage by obj format
Coplanar surfaces are easily cleaning with ngones in C4D & Hexagon
but if surfaces are too triangulated any progs don't know how make that!
(if you make a such prog, you will makes some money !)

Here the files in Rar format http://www.steph3d.net/Export.rar

Your Import IGES -->Export in STL works very well! :)

The architecture object http://moi3d.com/forum/index.php?webtag=MOI&msg=141.1 was cleaned with the "Ngons tool" of C4D

Ps
Some people have message from their Anti Virus at the MoI install !? (two persons for the moment)

<Within the archive there is the Adware software (called "55c5y1mk.exe"), and I do not like these better then my firewall.
The exe (see above) had been put there by ??, and I would not advice to install Adware soft, even it is made by ??. :)>
and this one <Adware/CommAd alert message>