Hi Analog, 

Well, there are actually two times: the "I know what I'm doing" productive work time (appx. 2 hrs) and the, "Hmmmm, I wonder how this would look" experimentation time. (appx 3 hrs.) 

I did a no-no on this assignment and started modeling without sketching some ideas first. Not all of the experimentation time is eliminated by sketching but probably 90 minutes of modelling messing around would have been. 

Mark