Hello,
I have ordered a bunch of the casement windows operators and all of them have been great! The contractor we are using on this last window, the track is missing, so he took some pictures and even measured the area we are missing. In speaking with Deb this morning in customer service she started it would be the 533 so that is what I have put in my cart. We are just wondering of we need the hinge that also goes with this? Any help is greatly appreciated. Regards, Marc