Hello, so after about 3 hours of trying to figure out what parts just broke on my sliding glass window, I have decided they were called top sash guides (the plastic part connected to the sash that the channel balance is held into place with). I am assuming they broke due to sun/age/etc, so I found your website and found replacement parts. Seeing how I am taking apart the window, I decided it was probably a good idea to replace the balance system as a whole. Being new to this, I wanted to make sure I was pairing the right balance system with the right top sash guide. I have a 38 lb sash (bottom only, top is fixed) looking at replacing the balance system with this
S380-30 and I am guessing I would replace the Top sash guide with this part
18-033. Please let me know if these parts are compatible, thanks.