Window balance into vinyl window

A home owner from Brentwood NH says:
September 20, 2019
Alarm installer drilled a hole in my vinyl window that allowed water in and rusted out the window balance. Removed it with much difficulty and some minor damage to the vinyl window chanel. Would like to find a replacement that match the original white color (photo 1) and in a width that stands a chance of going back in to the channel. I'm guesing that the original manufacturer inserted the originals during assemby as I can't figure out how to get a replacement that is the same width as the original into the channel. Thanks for the help!!!!
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Bob from SWISCO responded:
September 26, 2019

Thanks for writing in. We can help you replace these channel balances, but I'd like more information to be able to help. Can you provide us the length of the metal channel, not including any end attachments? Can you also show us any stamp code on the metal channel? Finally, is there any hook, fitting, shoe, or other kind of attachments on either end of the balance? If so, we need to see pictures of them. Many thanks.
A home owner from Brentwood NH says:
October 3, 2019
Thanks for your help. The old balance is marked 28C, it measures 28 inches long and the clip on end is I think called a #5? The ones I removed were factory painted white. Aside from finding the right hardware I have not figured out how they are going to fit back into the channel. I had to pry the old ones out.
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Tom from SWISCO responded:
October 3, 2019

Thank you, this is a huge help. Based on this new photo, I am confident that you can use our Series 770 as a replacement. Look it over and let me know what you think.
A home owner from Brentwood NH says:
October 11, 2019
Hey- thanks for the reply. Did not see it until today. Is there some secret to fitting a 9/16 wide balance into a 1/2 wide channel or is simply pry and pray?
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Paul from SWISCO responded:
October 15, 2019

Hello! In my experience, there's no trick to it. You shouldn't need to pry too much to mount it in the frame. It'll be tight but should work fine. This is the size balance the window manufacturer uses for this type of window.
28" Series 770 Balance
28" Series 770 Balance
S770-28
$12.70
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