window wont fit over channels

Thanks for posting, Greg. I'm sorry to hear you're having trouble. Could I see a couple pictures of your balance and the new balance side-by-side? That might help us come up with a solution.

Hmm... I feel like there should still be enough play in the sash to make up for the difference in the channel size. Have you tried shaving down the shoe a little? Give that a shot. Some older balances use a shoe with a depth less than 1" that isn't made anymore, and I think that's what you have. The tell-tale mark is the slot down the center. Most of the time our 15-005 shoe (which comes with our Series 380) works just fine, but in other cases it has to be shaved down a little. Let me know if that works!

Fabulous! Sorry again for the trouble.