Help to comfirm I'm bying the correct channel balance

A quick learner from Knoxville,TN says:
I need to replace both channel balances on one window because the bottom pivot shoe cracked. I measured the metal part ONLY and it's 33" exactly. I believe I need the 33" Series 795 Channel Balance stamp D (25 to 30lbs). Can you please see the pictures attached and help me to confirm? What happens if I get the sash weight wrong? Meaning the window is actually lighter.

User submitted photo of their window balance.
Profile picture of Paul
Paul from SWISCO responded:
Hello, Andre. I agree, our S795-33 looks like a great match. If you get the spring strength wrong, it will likely not operate properly, so you should definitely weigh your sash on a scale to be sure you're right. You may also need a stop like our 26-053, but you may be able to re-use your old one.
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