Thought I would give it a go so last night I pulled the cover off my Pro XS and thought “what is all this stuff”!! I know there are plugs under there somewhere but did not want to start pulling at stuff without more knowlwdge. I guess last time I changed a plug there were plug wires attached to each plug!! Think I will just wait and have it all done with the 100 hour service! I will get them to give me a mini lesson on plugs, filters etc!