Houston54 You may have missed your calling....what a professional writeup and pics. After my post, I did a search on "vent window" (my first search was on "wing window") and found some very good information. So I did one vent window using what infro I could find. Today, I will use your description and expect far better results than on my first attempt. I'm concerned about my first attempt as I have pounded the window seemingly as far as it will go and there is about 3/16" reveal. Fitting it into the new weatherstripping will show what my next step should be. Heres hoping it will be OK.
Thanks so much for the "education".