replacement balance

A quick learner from minneapolis says:
Hello, I have silver line single hung tilt windows. The t-lock's are made of plastic and keep snapping. It is as if the balance string is too tight and there is too much pressure when trying to close the window fully. I would like to replace a couple balances and see if that elevates the issue. My current balances are stamped with 26-7 and have a small tab at the top that a screw goes through attache to window frame. Your S795 looks like the right balance but it is stamped different. I weighed my window sash and when I hold it when standing on the scale it is 25 lb but when I just put the sash along on the scale it is 29. I am assuming I need to order the balance stamped 27E. However that only comes with the closed t-lock balance shoe. Does that matter? Please advise before I order. Thank you Sherrie.
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Julia from SWISCO responded:

Hello, thank you for writing in. I would just like to confirm a few details before I make a recommendation. Can you please confirm the length of your metal channel? When determining this dimension be sure to only measure the metal channel and do not include any of the attachments. Additionally, can I please see an image of your T-Lock shoe? The S795 comes with the 15-195, which has a width of 1-1/4".

A quick learner from minneapolis says:
The Balance is 27 inches (stamp is 26-7). I am pretty sure this is the right T-Lock: Silverline Inverted T-Lock Balance Shoe Open Cam 1 1/4? x 1 7/8? x 17/32
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Julia from SWISCO responded:

Okay, great! Thanks for the follow up pictures. If your balance is 27" in length, then you will need the S795-27. Since your window is between 25-29 pounds, you could go with the 27E stamp option. As for the T-Lock shoe, you would need to purchase the open cam 15-195B separately and then replace the one that comes with the S795. You can look at the video below for more information on this process. 

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