Alliance windows double hung tilt shoes and coils

A handy person from Ripon, WI says:
I have the above windows and most of the shoes are broken. A few coils are broke as well. I see my shoes are part 15-177 but the notes say to use coil 152-7. The sash weigh about 14 lbs each. Coil 152-7 does not look like it has the correct end. Could you check my work to make sure I'm correct?
Is there an updated kit I can replace these with that will last longer? I plan to order the shoes now and any coils I need I will have to get once I know which ones.
Thanks,
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Bob from SWISCO responded:

This does indeed resemble our 15-177 Pivot Shoe, which uses the Series 152 Coil Springs. For a 14 lb sash, a S152-7 7 lb coil spring on each side of the sash will do the trick. These newer springs do indeed attach differently to the shoe, using a screw like the 33-072 to attach, but they will work as replacements. Let me know if you have any other questions.

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