That's the idea. Someone on that site brought up a problem I'd thought of. If you have an HF with plexi windows, when you unhook the strap I can't imagine there'd be enough weight to make the window drop. I think you would have to push the window down by hand and only use the strap to bring it back up.
Stan,
Looks like the drop window in the old wooden railway carriages, simple but very effective
Brian
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