Okay, I've resolved the windows issues with a set of 3 exit/escape windows to replace the crank-out models that didn't close properly. Must have be a manufacturing flaw.
Now I have 5 windows all from Callen Campers a.k.a. CustomRVWindows in El Cajon, CA. I drove over on Wednesday to return the old windows and get the replacement windows and get a new window that will be the skylight in the popup top.
BTW, CustomRVWindows accessible on Ebay has hundreds of windows in stock in many sizes, shapes and configurations. Well worth a look, if you want new windows or replacements. Nice folks; excellent customer service. Call Tammy.
Here's the fixed-pane front window that will go above the galley on the slanted upper section. It is 30x10-inches nominal.
This is the 22x18-inch fixed-pane skylight for the popup top.
The three exit/escape windows at 30x22-inches will be installed on both sides and the rear.
The opening mechanism is a simple pin-hinged bar that rotates into the locked position without protruding too much into the interior. There is a screen not shown in this photo.
In the fully open position, the bottom extends out about 8 inches, which should allow for more ventilation than the crank-out windows that only opened on the lower one-third. The trade-off, I suppose, is that the screen on the crank-out was that much smaller so visibility would be somewhat better on the crank-out than on the exit/escape windows with the screens installed. Perhaps, I'll leave the screens off when the flying creatures are not around.
As you can see, the opening is quite large.
To allow a range of openings, I'll add some means of adjusting the opening bar extended length. I can think of several ways of doing this. The simplest way might be to insert a small wooden wedge between the bar and the edge of the slot thru which a moves.