You know, I think this thread is about people wanting a method to find a CG of an existing model. It's probably true nowadays their model is an ARF that they just bought almost-RTF.

I'm betting a lot of them actually don't have a yardstick, or don't remember where it is. Truth is, asking them to draw an accurate scale layout of the wing might be pressing them too. Figuring out how to scale the drawing isn't simple. And they'd have to measure then, and do it accurately. And not make mistakes drawing.

Since they're already measuring, they can save a bunch of time by plugging those numbers into the application. Any more effort than measuring certainly can't be simpler and can't possibly be easier.