Sash Cam for Channel Balances + 30" Channel Block & Tackle Window Balance

A home owner from Gainesville FL says:
we have ordered diff versions from Amazon without any luck. please help us identify these parts. In addition to channel 2930 (in photo) we have a channel with another code: 29 4 BSL MH.
We believe these are original parts for our home built in 2001 (Florida).
thank you.
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Bob from SWISCO responded:

Thanks for posting. Assuming the balances with different stamps have the same nylon fittings on each end, they look like either the S380-30 or S385-30. The only difference between these two balances is the depth of the bottom nylon shoe, or 'heel-to-toe' measurement, so compare both with your old hardware to see what matches best. The diagram below shows the difference. For the balances stamped 29-3, use a stamp option of 2930. For the stamp codes of 29-4, choose 2940. For the Top Sash Guide, see if our 18-166 matches up.

S380vsS385
A home owner from Gainesville FL says:
Thank you so much Bob for this amazing info. We will check and compare soon before placing our order.
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