I just changed the oil and filter on my recently purchased 2008 TW. New filter, yes it is the correct one. New o-rings as well. I have a slight oil leak right below the left hand screw on the oil filter cover. This occurred after a ride around the block. I let the bike cool down, removed the cover to make sure the o-ring was not crimped in anyway. It is fine. Reinstalled and there is still a slight leak. Other than the o-ring, are there any other gaskets? There was not a leak prior to changing oil. Any thoughts as to what I might be missing? I do not want to over tighten. Thanks.