IronCAD is the only CAD solution on the market today that utilizes both the ACIS and PARASOLID modeling engines to deliver superior and frustration free models. If you not using IronCAD I promise you that you have been in a situation where you just couldn't get the model to be created no matter how hard you tried. Well rest assured that in most cases its not yoru fault. It's simply a limitation of your CAD application.
This video will show such and example when I was trying to create a "monkey tail" handle for a beer mug. HOWEVER, the difference is, that armed with IronCAD I was able to switch the primary kernel to deliver finalize the model and deliver my design on time!!!