Hello there. This exact pivot shoe is no longer made, but our 15-177 can replace it. This shoe, like your old one, works with Series 152 Coil Balances. For the replacement springs you have to choose spring weights. These indicate the weight each individual spring can uphold. If there are no stamps on the old springs that indicate this, or you're unsure, just weigh the window sash these balances support, and I can work it out for you. If your old housing is undamaged, you can reuse it; otherwise, the 15-143, 15-144 and 15-145 newer style components can be used to 'sandwich' around each spring. Let me know if you have further questions.
As it turns out, making a cutout is precisely the trick we recommend. We actually have a video guide that shows you how we do it, which you may find helpful.
Yes! That is exactly right. For a sash weighing 19.8 pounds, using two 5 pound springs per side should be perfect. The S152-5 is my top recommendation.
I was happy to be of service. Please feel free to contact us again if you had any follow up questions!
