Norm - yes the windows hang from the top edge of the inner door panels but the load is shared by the sliders (as I'm sure you can recall) - but there will also be a lateral load - and as Craig reminded me, tension in the glass caused by door slamming whether intentional or accidental. The weight and shape of the glass windows makes them unwieldy and heavy and my concern is that they should be adequately and securely supported under all normal operating conditions - but you may be right about the velcro - it's just that I dont intend to use it !