I'm in the middle of my first oil change on my new to me 2005 950 Adv. After using 5 old t-shirts, 5lbs. of kitty litter, 1 roll of paper towels, and a can of contact cleaner to clean up this mother of a mess, I forgot if there was a crush washer or an o-ring on the oil tank drain plug? Orange Crush please HELP!!