Window channel balance (29 3 eo4u cmc)

A quick learner from Charlotte, NC says:
Channel balance for tilt window. Believe I need 30" 765 with a 3 for lbs. just want to confirm before I purchase.
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Tom from SWISCO responded:

I'm afraid I can't confirm what you have from this photo. Too much of your balance is obscured while it's still installed. I will need you to remove it from the window and show me a clear picture of the top and bottom ends. 

Please note that the balance we need to see must be whole and undamaged. If any pieces are broken or missing, then we'll run into the same issue.

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