Channel Balance 1/2"x21" with 19-002 & 15-003

A home owner from Long Beach, CA says:
I have a wooden sash, double hung, non-tilting window with a bad channel balance. The part is stamped with "20 4 FS CALDWELL".

Size of the metal channel (not including plastic top/shoe) is 5/8" x 21". Weight of the sash is 18 pounds.
Top matches Swisco 19-002
Shoe matches Swisco 15-003

I didn't see this exact combination on your order pages.

Can I get a pair of replacement units, pre-assembled?

Profile picture of Tom
Tom from SWISCO responded:
Hey, Jim. Are you sure you have the 15-003? This is not a common combination, and many people confuse the matter. I think it's more likely you have either our 15-001 or 15-002 shoe.

Now, as you can see, there is only one difference between these two shoes, and that is their depth. See the picture below for detailed dimensions. The Series 351 uses the 15-002 while the Series 390 uses the 15-001.
Comparison of <a href='Channel-Balance-Shoe/pd/Replacement-Sash-Support-Channel-Balance-Shoes/15-001'>15-001</a> & 15-002
A home owner from Long Beach, CA says:
My balances are a different brand than Swisco. I used a caliper to measure, the shoe is definitely 1-3/16" long.

If I use the 15-001 it's only 1/16" smaller. Do you see any problem with that slight difference? If not I could order:
21" Series 390 Channel Balance
S390-21 option: 2040
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Tom from SWISCO responded:
No, if you're certain you have the 15-003 then I think it's best we go with that. Check out this Custom Channel Balance Request Form I've started for you based on your specifications and fill out the rest of the information. One of our representatives will get back to you with a price quote and an item to add to your cart.
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