I purchased 15-118 to replace the pictured pivot shoes. The new pivot shoe will not allow me to hook the spring tip without modificatio. The pivot bar when I have to replace two of them, will allow my window to slide out of one or the other of the pivot shoes . I am using a 900 - 29 spiral balance with the red tip the pivot bar appears to be 1/8 to 3/16 of an inch short on the slotted end. All other dimensions does work with the window.
I am attaching a picture of each piece and hopefully you can help clear this up for me.
The pivot shoe I'm using the picture shows a blue Cam insert and the ones I have has a white Cam insert.