I read on this forum a while back about using #9 faucet o-rings for your drain plugs. Just wanted to say THANK YOU to who ever posted it. It saved me yesterday. Changed out the primary and oil. Went to put plugs back in and only had 1 o-ring left. Shit!! Remembered about that post, ran to lowes, and bam, good to go. Perfect fit. This post is to say thanks to who ever posted it and a FYI for anyone looking for the drain plug o-rings.