Top sash guide for Gapco Window

Hello,

I am trying to identify a top sash guide for a gapco window. I think this is the one that works with what i have provided pictures for. I see that the style has changed and i wanted to confirm the new style will work with my old style. Please see attached pictures to verify my needs.
Thank you

Nope, this one didn't work for me. I have the same sash guide as pictured above and I purchased the 18-156 part to test it, and it does not stick out enough to hold the channel balance. Notice the blocky square part sticking out on the photo above - that extra width is required to grab the channel balance.