Simonton windows need new coils

Thanks for posting, and for your praise. It means a lot to hear that.

As for your balance system, I agree with your assessment of replacement parts. These all look to match what you have. There's a good chance your springs went haywire simply because they got old and wore out. Based on your pictures, everything looks to be assembled correctly. As for the spring with the square cutout in a different spot, that'd be our Series 160 spring. Some balance systems that use the Series 160 and Series 165 have them sort of "piggy back" off one another, with the "T" tab on the top spring going into the slot on the bottom spring, and so on if there are more than two. Does that make sense? In your case, I'm not sure how relevant it is, but I would stick with what you had originally just in case.