What do you use when lasering on ovals - a jig or something else? I ask as so many materials vary in sizing from a couple of hundredths of an inch upwards and if you build a jig, then what happens when you have that different size shape. No such problem really exists outside of ovals, as they don't necessarily align properly if not using some type of jig. I guess it's the nature of the beast, like in woodworking - measure twice (or more) and cut once; but ovals are an odd lot.