Paul from SWISCO responded:
May 12, 2016
Thanks for posting, Derek. Could you use our 18-036? Look it over and see what you think. If not, can you show us a picture of the top sash guide in question? That would help us find a good match. Can you also confirm that the other dimensions for the 18-009 are identical to yours? If they differ in any way, we will need to know exactly how.
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