Hi Burr, yeah definitely having a good clean high quality model will help filleting a lot.

If you have some kinds of geometry anomalies like surfaces that bunch up and overlap back on top of themselves, that will cause problems in pretty much any fillet engine.

One area where the more sophisticated fillet engines can have a big advantage though is in handling more kinds of corner configurations where multiple fillets are converging on a single point. The Solids++ guys are adding more corner cases to be handled by their fillet engine as time goes on as well though.

- Michael