MST 3850 Pivot Shoe

A home owner from Maryland says:
I have windows from BF Rich. I need to replace the Pivot Shoe.
From the window label
Code BFR
Rating H-R55
Series Cabernet DH
MST 3850
Pictures are attached. I think I need the 15-129 but would like your assistance in selecting right part.
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Profile picture of Tom
Tom from SWISCO responded:

I'm not sure that the 15-129 will work for you. It looks like you have a coil balance, which isn't a type that's compatible with the 15-129

Would it be possible to see a picture of your shoe out of the window? That would help us determine the best replacement.

A home owner from Maryland says:
Sorry, not exactly sure what you are asking for but here are pictures. Picture 6 is the bar coming out of window.

Pictures 4 and 5 are from window frame.

Hope that helps.
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Profile picture of Tom
Tom from SWISCO responded:

Thanks! Your pivot shoe is the piece in your third photo. It has that rotating center metal cam. If possible, I would like to see it out of the window. If you can also remove your springs, that will be a huge help. 

Basically, this coil balance system isn't like anything we carry, but it is similar to a few different kinds. I'm hoping I can narrow it down to one possible substitute. It won't look the same, but it will work the same. I just need to figure out what's in there now.

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