Today, I changed oil in my 1330 for the first time. I went slowly and took my time so that I could learn as much about the machine as possible. It was significantly different from the 998. I am not sure that I would consider it to be any easier than the 998 but, all went well. I used the new oil change kit and all was good except there was no copper washer ( PN 420250640 ) for the gear box drain plug. Is this normal or was mine missing something ?