Build a Registration Board

If you are starting a manual shop, build a registration board immediately. It costs about fifteen dollars and gives you three fixed points of contact that replace endless measuring with a T square. 

Once it is dialed in, setting up an eight color job can take minutes instead of an hour. Pre press might still take time, but press setup becomes predictable and repeatable. That consistency removes most of the guesswork from screen alignment. 

Cheap boards using simple pins work just as well as expensive systems if the contact points never change.