i use various cad products and have dabbled in some of the modelling programs including 3ds Max and rhino. i totally agree that having a sketchup interface to allow nurbs modelling would make creation of complex 3d geometry much more intuitive. it is far nicer to manipulate geometry using realtime tools such as push / pull or follow me than delving into complex dialog boxes and altering parameters that are barely understandable at best. graphics products that operate more like manual drafting techniques are far more intuitive and are a more direct emphasis of the creative impulse. numbers get in the way of true creativity unless you are gifted in that faculty. it seems like sketchup could truly start a revolution in graphics if it supported nurbs modelling...just a thought