Did my winter and 30,000 mile service this weekend, included changing all three holes. After reading on HD about cam chain tensioner wear and checking for junk in the oil filter I decided to cut the top (end that screws on) off the oil filter and take a look. Was really pretty simple, just rotated it in the vise and cut with a hack saw. The filter pulled out intact. Pleased to report that no junk (metal or plastic) in the filter, just dirty oil. Thanks for the tip. At 30,000 miles I won't worry about checking my tensioners for another year.