Caldwell Channel Balance

A home owner from Chicago says:

I've done some digging and am not yet sure I've found the correct channel balance and top/bottom guides. I've uploaded a few images here. The markings on the balance say 29 3 DO CALDWELL. The length is 30". Please let me know which replacement parts you think are the correct match.

User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Hey, thanks for posting. I've narrowed this down to two possible channel balance Series: either our Series 380 or our Series 385 balances.

Now, as you can see, there is only one difference between these two Series, and that is their bottom shoe. The Series 380 uses the 15-005 while the Series 385 uses the 15-004. I can't quite tell what you have based on your pictures, though. Please carefully compare their dimensions to your own hardware and see which is a better match.
15-004 and 15-005
A home owner from Chicago says:
Great, thanks! I just ordered the parts and will let you know how it turns out!
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