The magnifier @dangcaonguyen recommends is ideal for checking stylus alignment and my alignment tool (the SmartTractor) comes with exactly that. You may also want a hand held currency scope to check the condition of your stylus. Like this one
https://www.amazon.com/Forrader%C2%AE-Pocket-Microscope-Currency-Detector/dp/B00JEKXBQ2
https://www.amazon.com/Forrader%C2%AE-Pocket-Microscope-Currency-Detector/dp/B00JEKXBQ2