Can you identify my Gapco channel balances?

A home owner from Carol Stream, IL says:
I would like confirmation of my part number. I have GapCo windows. I attached images of a balance. Some are stamped 2730I and some 2730G; I am guessing the letter is just the machine ID. I require multiple lengths, but I will buy one 28" first to verify the fit before ordering the rest.

I think I need the channel balance shown below, but if you need other images/information to confirm the part just let me know.

28" Series 385 Channel Balance Product Code: S385-28 Option 2730

P.S. You website it awesome. The amount of detailed information is incredible.
A customer submitted image of their channel balance attachments.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting! I'm glad you're happy with our site.

I agree, our S385-28 appears to be a good match. The shoe is definitely over 1" deep, which differentiates your hardware from the Series 380 balance. That's the tell-tale sign!
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