Spring for S210-10 assembly

A home owner from Cortland, OH says:
July 7, 2020
Hello,
I need to replace the spring in coil assembly S210-10. I see you sell the entire assembly, but the components I have are good except for the spring itself. Can you indicate what the spring part number is?
Thank you!
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Bob from SWISCO responded:
July 9, 2020

I am afraid we don't sell the spring components for the Series 210 separately from the housing units. They springs are similar to our Series 180 Coil Balances, which are used by the 15-087 Balance Shoe; but they're different enough that I'd advise against trying to swap out the springs. Plus, there is no 10 lb unit for the Series 180. Ultimately I think you're better off just replacing the old unit and spring. 
A quick learner from Marquette, MI says:
July 9, 2020
Is there a way you could show me how to replace theses, It would seem there would have to be a place in the channel to replace these but I do not see it in my windows. thanks
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Bob from SWISCO responded:
July 10, 2020

See the video below. While for a different coil balance system, the principles are essentially the same, especially concerning making 'cutouts' to remove and replace the balances. 
10 lbs Series 210 Roller-Tilt .880, Single
10 lbs Series 210 Roller-Tilt .880, Single
S210-10
$8.82
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