Counter balance for older crestline? window

A landlord from Roscoe, IL says:

Hi, I believe you have replacement parts for this old block and tackle balance. This is a single hung window, about 39" x 29" The metal clips at the bottom of the window are

2 1/2 " long. One has a 4 on it and one has a 5 on it.The rod unit is over all 27" long.

The black piece at the bottom of the rod is 1 1/8- or slightly under 1 1/4". I'm hoping you can help me with these parts and directions for installing them. Thank you so much.

Linda 

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Casey from SWISCO responded:

Hi Linda, 

Your old-style crossbow balance is no longer available but many customers have been able to use the S795 as a replacement as long as your balance spring measures 1/2" in diameter. Take a look at the conversion video below that will walk you through the process. Thank you!

A landlord from Roscoe, IL says:
Hi, the overall length of my old balance is 27" including the screw clip at the top. Minus the screw tip, its 26 1/2". The spring is 1/2". So if I measure from the bottom of the old t-lock minus the screw tip at the top, I get a little less than 26 1/2". Am I correct in thinking I should order the 26" S795?. The t-lock at the bottom is 1 1/4" and the pivot bar holes look like the match the
26-021 pivot bar. Do I still need to weigh this window or have I got enough info and do I need to order this separately? Thanks!
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Casey from SWISCO responded:

You are correct that if your balance measures 26-1/2", you would use the S795-26 channel balance. Unfortunately, you will still need the exact sash weight to follow the chart under the balance product description and choose the corresponding strength option. We also can not process orders through the discussion board, but you can purchase the parts that you need directly on our website or by giving our customer service team a call at (888) 991-1929. 

How to Convert a Crossbow Balance to a Channel Balance
How to Convert a Crossbow Balance to a Channel Balance
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How to Replace Damaged Pivot bars
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Removing Rusted Pivot Bars
Removing Rusted Pivot Bars
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Anatomy of a tilt window
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How to Install a T-Lock Shoe on a Channel Balance
How to Install a T-Lock Shoe on a Channel Balance
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How to install the 26-200 Screw Plug
How to install the 26-200 Screw Plug
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Modifying the Series 795 Balance
Modifying the Series 795 Balance
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