BALANCE IDENTIFICATION

A contractor from MILWAUKEE says:
September 30, 2020
WEATHER SHIELD WINDOW
BALANCE MEASURES 34" IN LENGTH
IT HAS A BALANCE KNIFE SHOE WHICH IS STILL IN THE WINDOW FRAME
THE BALANCE WAS NOT INSTALLED WITH AN S CLIP.. IT WAS SCREWED IN AT THE TOP
ALTHOUGH IT IS RIBED IT FITS IN THE JAMLINER LIKE A PLAIN BALANCE(THERE IS NO OVERRLAP OVER RIBED CHANNEL)
YOUR HELP WILL BE APPRECIATED
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Bob from SWISCO responded:
October 5, 2020

Can you remove the bottom knife shoe and show me? Its identity will help narrow this down. Many thanks. 
A contractor from MILWAUKEE says:
October 5, 2020
HERE ARE THE REQUESTED PHOTOS
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Bob from SWISCO responded:
October 6, 2020

Thanks for clarifying. I believe you can use our standard S751-34. A stamp option of 33TG would support a window sash in the weight range of 29 through 36 lbs, does that seem right? Weigh your sash if you're uncertain. We don't sell these balances with a hole for a screw, but we suggest drilling a hole in the metal channel to make room for one; this should work. Let me know what you think. 
34" Series 751 Channel Balance
34" Series 751 Channel Balance
S751-34
$12.27
How to install a ribbed tilt channel balance with knife lock shoe
How to install a ribbed tilt channel balance with knife lock shoe
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