Anyone used a USB microscope to align cartridge?

I am both short and long sighted and its getting harder for me to visually align stylus especially using the MintLP protractors which require a 10x LUPE to be done right. I have seen USB Microscope camera's on eBay etc and some of them go for about $30 while others can run to about $400. All of these USB mmicroscope camera's claim magnification from 10x-200x and beyond. Was wondering if anyone has tried using these to align cartridges and what models you would recommend. The cheaper ones seem too cheap to be true and the more expensive ones should be fine but these offer magnification from 50x or higher and I am thinking this is too high for the prupose of cartridge alignement. Any comments or inputs would be appreciated.