Top Sash Guide

A quick learner from Coto Laurel, PR says:
Recently I ordered Series 350 29" side load channel balance for non-tilt window sash specifically part number 2830. I find I now need a couple of Top Sash Guides to help keep the channel balance behind the window. I have attached several pictures with measurements. Can you help me in identifying the needed part. I appreciate you help and this handy website.

Thank you
User submitted photos of a top sash guide.
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Paul from SWISCO responded:
It's hard to tell what you have without seeing an undamaged version of this top sash guide, but start with our 18-009. Could this work? Carefully compare our information and dimensions to your own part to confirm.
A quick learner from Coto Laurel, PR says:
Last week I ordered eight top sash guides 18-009. They are not going to work because the screw holes do not line up. They do fit down into the top of the window area. I have removed a complete top sash guide and have attached pictures. The first two pictures show what does fit. The third picture is what was ordered. The third has two screw holes verses the original. The fourth picture gives a comparison between the original and what was ordered. The head of the original appear slightly larger. The length of the original is slightly shorter. Can we try again with a second recommendation.

Thank you for your help.

Larry
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Paul from SWISCO responded:
Hello again, Larry. Sorry to hear the 18-009 didn't work. I'm afraid your new pictures didn't come in. Could you try again?
A quick learner from Coto Laurel, PR says:
We will try again with the pictures. Hopefully they will come through this time.

Thank you again for your assistance.

Larry
User submitted a photo of a top sash guide.
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Tom from SWISCO responded:
Hey, Larry. I'm afraid we only received one picture, and I can only see that the head is a little smaller. Is there any way we can see an entire undamaged version of this top sash guide? Can you also give me your dimensions as compared to the 18-009? These measurements can get very specific and I cannot tell what yours are based on just the tape measurer.
A quick learner from Coto Laurel, PR says:
Tom,

I will try sending the attachments for the third time. I do not know what is happening. There should be four photos showing size, of sides and length.
User submitted photos of a top sash guide.
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Paul from SWISCO responded:
Hey, Larry. Thanks again for your patience. I'm afraid we haven't been able to find this exact top sash guide. Our 18-166 is similar, but not exact. This may be the closest match we currently carry. Could you find a way to get it to work in your window?
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