If it's loose you can adjust it. If it is working and not leaking I wouldn't mess with it. One kit is as good as another, but no kits I've found have both the bottom seals. They give you a extra spacer to take the place of one and with one lower seal it wont work, don't even bother trying it. I always get 2 kits, that way I have 2 bottom seals and extra spool valve seals, they are a real pain to change and if you break one (which you probably will) you would have to go buy another kit anyways.