Hi Steve,

I have also had the same problem using IGES from our parasolid modeler - EdgeCAD into Shark FX

You cannot beat native geometry for complex calcs which is why models built in ViaCAD work better.
Like you I will be doing some tests with formats / method and will report back here next week so that
people can draw some conclusions what works well with MoI.

Rhino & MoI will always be ideally matched for obvious reasons....lets see if we cant add a third app to
complete the bundle for shelling (perhaps ViaCAD)