I have used CAD applications (AutoCAD , SolidWorks) early in my career and was actually were quite proficient with them. (Oddly I donít find Sketchup all that intuitive). Now that I spend most of my day in front of two monitors (developing applications), the last thing I want to do is corrupt an enjoyable, relaxing hobby with an optional injection of technology. Iíll do all my planning / sketching /dimensioning with pencil and paper. If itís something I think Iíll need reference to again, I will document it to a minimal readable form. And yes I make occasional minor process / sequence errors. I donít have a CNC and have no space for, or interest in acquiring one this point. Old-school still works for me.