I have been using Autocad 2007 to do drawings and Enroute to machine and nest. This has worked well until I started to do morre complex 3d and 2d bezier curves and ellipses. Enroute becomes very unstable at that point. I don't really understand why and Enroute doesn't have good simulation so I am at a loss. I have downloaded rhino 3d and it seems easy. I am sure I could switch to it for drawing as the object track, snaps, and transform tools are all very much like Autocad. How well does RhinoCam and Rhino Nest work as add on's to Rhinocerous 3d for 3 axis routing? Is it hard to learn? I need a more reliable design/machine solution. Thanks for any input. Multi-thousand dollar software systems are hard to keep buying.