Either to look at a profile of a cartridge or to use during set up of SRA, you will need to get a decent microscope. The cheapo's on Ebay are a waste of money - I eventually threw my $10 made in China microscope away. I bought a used dino-lite microscope model AM4515ZT (retails for ~$750) and have only been using it to look at profiles of cartridges. I will say even that also requires a lot of patience and skill. To measure/set SRA, I would need a tripod/stand of sorts (based on my setup) and have not ventured that far into the pursuit. If you're serious about wanting to use a microscope to set up a cartridge, the Wallyscope looks interesting and costs ~$1250. Good luck.
USB Digitil microscope advice
Are the cheapo $30 ebay devices good enough for cartridge set up?
Or am I missing something and the more expensive offerings necessary?
Any specific ones you likey?
Thx