Hi Nick,

> It was created with 123D ;-) It's suppose to be solid and in
> fact that is how Alibre and Inventor import it and the dwg in
> AutoCAD. I hadn't noticed the little slivers in the slot fillets...

Yeah it also imports into ViaCAD as a solid as well. One thing all those have in common is that they are all ACIS based. I wonder if their importers see that the STEP file was also created by an ACIS modeler as well and skip doing some of the more complex (and therefore more delicate) types of processing that can get messed up with little slivery surfaces.


> I was importing to MoI to do some embossing. MoI is top notch for
> doing that sort of thing (among others).

Will the surface model that I attached above allow you to get that job done? You could probably use those surfaces for constructing some additional cutting object pieces, and then you could import those cutting objects into 123D to combine them into the model there.

- Michael