Maybe 9? If you find yourself making a lot of jigs, small thingies to hold one thing to another, or little mechanisms, it's a huge timesaver. Making a nice adju

Maybe 9? If you find yourself making a lot of jigs, small thingies to hold one thing to another, or little mechanisms, it's a huge timesaver. Making a nice adjustable mount for a camera goes from being a lot of machining to a few hours design work. Basically, it's very good for making things for holding awkward pieces in place while you machine them, or for holding a tool in place while you make something. Or like, all the little cable clips and bits of plastic you use to hold other components in place.