I would test it the old tried and true way. I plan to use these methods myself, but so far this is just info from experienced mechanics, not my direct experience. Drive onto a couple of sheets of newsprint in your garage and see if one or both wheels scrunches the paper up. In perfect alignment, it will not wrinkle the paper. After that, another way to self check alignment is to carefully measure the distance between front wheels at the front of the rim (measure bead to bead, not tire to tire) and the rear of the (front) rims. In alignment, the distance is exactly equal. Some sort of spanning adjustable rod will be needed, working on that.