Bob from SWISCO responded:
July 23, 2023
Hello there. For the channel balance see our 351-28 or 390-28. The only difference between these two balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement, so compare both with your old hardware to see what matches best. See the diagram below as a reference. In either case, choose 2730 as your stamp option. Comparison of the S351 and S390 balance shoes.
I agree, the 18-008 seems to be your best bet for the Top Sash Guide. Just double-check your dimensions in comparison to the diagrams below, and let me know if anything seems off. Detail of 18-008
Alternate view of 18-008
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