John Murphy

Seems a fairly common problem. I found some maintenance tutorials on YouTube, a Guy named Andrea Minoia deals with how to fix it in this link https://www.youtube.com/watch?v=S2aZLzfOe9c&t=703s about 10:55 in. He gives a link where to purchase the replacement on Amazon. Hope this helps. 

BTW his other maintenance videos are also worth watching - clutch, gearing maintenance and backlash removal. I just finished up regreasing everything and currently running through a test to ensure no overtightening after backlash removal.

Seems a fairly common problem. I found some maintenance tutorials on YouTube, a Guy named Andrea Minoia deals with how to fix it in this link https://www.youtube.com/watch?v=S2aZLzfOe9c&t=703s about 10:55 in. He gives a link where to purchase the replacement on Amazon. Hope this helps. 

BTW his other maintenance videos are also worth watching - clutch, gearing maintenance and backlash removal. I just finished up regreasing everything and currently running through a test to ensure no overtightening after backlash removal.

Got a nice shot of this wonderful event while it was twilight and the sky still blue at 21:10. 

Venus in M45 Twilight by John Murphy, on Flickr

Skywatcher SA

EOS 7DMK2, EF70-200mm F4L USM @200 F4.5

ISO200, 30 sec, F4.5 single frame processed in Lightroom