Do-It-Yourself Story

Remove old flip panel. Carefully pop out the "flip panel window" from the old unit (I didn't realize I needed to order a new flip panel window with the new flip panel...good thing my old flip panel window was in good condition). Set the old flip panel window aside (the flip panel is more pliable without the window). Insert the new flip panel (without the flip panel window). Once in place carefully snap the "old flip panel window" in place. No tools were needed to install the new flip panel/window.