Kitchen sink's been dripping forever, and I bought a cartridge set awhile ago, but since I don't have shutoffs under the sink, I didn't put them in cause I didn't feel like turning the mains off. Had to go in the basement today, so I figured it was a good time to get it done. Cartridges came with a couple little springs and seals, and I didn't remember them from before, so I thought "Whatever...", and installed the cartridges without them. Well, the sink's still dripping, and looking up a video showed me the part I should've put in. The drip's way slower than before, so I'm calling it good enough til I have to go in the basement again, but that's annoying as shit. The seals are in the cabinet, and I just have to remember they're in there. We'll see...