Oh, and if you're like me, trying to put basses into something like autoCAD is about the biggest waste of time ever! But, I'm no engineer either; I have a scientific calculator but I barely know how to use it...
It is interesting, however, to actually measure as many instruments as you can. I always mean to write them down and don't, but still, you get some insights into why things work the way they do that you might otherwise overlook.
Actually, that brings me to another comment - make a point of trying to draw and carve every day - even if it's just sketches and whittling it will help develop your eye, as well as coordination, muscles, sense of proportions, understanding of wood, everything. Plus it forces you to sharpen your tools a lot.
Kind of like how just playing basses and listening to music all the time will make you a better musician, even at times when you're not practicing for hours on end every day.