70-200/2.8 non-is slowly but surelly falling apart

Hi guys

Until now, my non-IS 70-200/2.8 had issues with front part of lens (part infront of focus ring) getting loose. I can easily fix this myself. But lately also second part (focus ring) is getting more and more loose, so it feels like whole lens has something like 2mm movement.... Yeah it feels like my 70-200 is starting to be push-pull lens
Anyway... does anyone have any idea where screws to fix focus ring part of the lens are? I know for screws for front part of the lens, but no idea about this second part of lens.

Any help and tip would be appreciated.

Thanks,
Primoz

My 70-200 2.8 had the same problem with the front lens element. I know it's not what you want to hear; but I sent it into Canon to have the front element aligned tightened. Sorry I can't help with loose focus ring. I got it back from Canon and sold it to another member on this forum.

this may help: http://www.f20c.com …0-200%202.8%20L%20USM.PD​F

or not...