Series 770? But skinnier, and ribbed

Question

I bought Series 770 balances for my windows(2060266). But they don't fit with the tilt latches. A Swisco rep told me I have a plain channel/ribbed channel hybrid balance, and I need custom help.
Here are some pics of my ribbed balancers. My existing balancers are almost identical to the S770 but ribbed and just slightly narrower (just under 1/2") with a plastic champagne cover that goes on top of the balancer.

I have tilt sash windows so the angle on the ribbed balancer is needed for the tilt sash latch to engage fully which I didn't realize before.

If you can make those to match I'll probably order 4 of each 29c and 29d. Thanks for your help.

Jasmine · Accepted Answer

Thanks for reaching out! I am sorry to hear that your existing balances did not work out for your however, it is likely that we will be able to supply you with the right balances for your window.

To start, when you state that the channel is just under 1/2", I'll need to know just how much under. We'll need to know the exact width of the channel to confirm that we can supply you with the balances.

Since these will be a different type of balance, the stamps will be different. Therefore, I'll also need to know the exact weight each of the sashes these balances will need to carry.

Please confirm the exact number of balances you'll need for each weight.