I have that thank you, that is what I used when I first started, then I wanted to 3d print my jewelry and the RhinoGold/MatrixGold was suggested to me. I wanted to go commercial printing with the jewelry was a bit too expensive at the time and had this expensive software too so thought well I will just offer my jewelry online at my grid. Boy did I get the complaints that my jewelry was heavy LOD so I spent time decimating etc until it lost the design almost and still some is very high for that I do apologize. I love JewelCraft it works really cool then with blender modfiers there is so much you can do. I still have so much to yet learn in Blender when I got RhinoGold I put down blender for a bit and soley used RhinoGold so I got rusty in Blender. I use RhinoGold quickly and it has features Blender doesn't have so I use both.