Greetings. My 5-year-old Canon EF L USM 24-125mm f/4 II has loose front element -- it has has a lot of play. I am wondering if anybody repaired this lens before and can give me an advice. So I thought some screws must be loose inside, i thought if I opened the lens and tightened the screws the wobbliness of front element wod go away. So I did -- stripped the lens down to telwcsopic barrell and found all screws to be tight. I am thinking now that maybe the 3 guides for zoom barrel P/N - YF2-2027-000 are worn out causing front elelement loose? I am trying to figure out that this might be the case before buying these guides at $12 apiece on ebay. Any suggestions will be most welcomed!