Locate dealer you are willing to purchase parts from on going basis be it distance away they all have service manuals digitally. They will share a digital manual with you if you trade with them and provide your serial number of your unit. Find a dealer you are comfortable with first. I would be hesitant to purchase any other filters than LS for the first 6 years knowing you expect warranty from LS. As with tractor brand they look to see if you factory filters on before honoring any warranty claims, they are trained this way. Dealers have manuals to share if you are solid customer they trust.