very difficult to set up for a stable, focused imageYes, I agree. Here is what I use, it comes with decent base. Has manual focus too, so you can dial in your focal point (the stylus). I only use this to align my cartridge. It does not have enough magnification to look at a stylus.
https://www.amazon.com/gp/product/B01IEFGC5E/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
You can see on my System page, there is one photo taken with this device that shows my cantilever and stylus.