replacement of balances

A quick learner from Michigan says:
I have 8 windows, of which 7 of the balances are in need of replacement. These windows were installed in 1987 and are in excellent condition with the exception of the balances on some of the windows. Two questions ~ first, there are three different window widths 2 are 44", 4 are 40" and 2 are 38" -all are 58" high. Are the balances the same or interchangeable regardless of the window width. Second question - it appears they are installed with what appears to be a staple type of nail. Can screws be used to fasten (I haven't watched the video)tutorial. Thank you.
Andersen Window balances
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Paul from SWISCO responded:
I see in your photo that you have a stamped weight "10#27," which corresponds to our 24-1033 Andersen replacement balance box. You'll need to check the other window balances for their numbers, though.
How to replace an Andersen Window Balance
How to replace an Andersen Window Balance
VIDEO
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Andersen's Narroline Sash Balances
Andersen's Narroline Sash Balances
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