Just a suggestion....I found that with new (C/D) glass it was a good idea to have the wing window frame mounted in the assembly. That way you could close the window up and latch it to insure it fits correctly. That way you can line up the vertical straight edge where you want it and the latch will hold it until it sets. My first try with tapping it in, seated it too deep in the track and it barely caught the vertical rubber seal. I had to pull it out of the frame further than I wanted. The glass could have been cut 1/8" wider and it could have been seated all the way in. Hope this helps someone avoid the little glitch I encountered.
