29 9 FW CMC 4 channel balance replacement

A professional from USA says:
Can you identify the balance (it
User submitted image of their window hardware.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting. I'm afraid I can't make out your balance based on this picture, but I don't think you need to replace it. Rather, the issue appears to be the top sash guide. See the video below for more information.
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