Rob,That's brilliant, thank you. I need two identical ones. It has to fit over 6mm glass so 7mm with something internal like a thin neoprene sheet would be fine, as long as it stays put. 1mm neoprene might be a little thick though. Being pedantic, the only thing I'm not sure about is how tight that will sit against the edge of the glass, the commercially available, but too small, ones look squarer in profile


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Is it magnetic? Or will I n<script id="gpt-impl-0.25115873216392326" src="http://partner.googleadservices.com/gpt/pubads_impl_75.js"></script>eed to glue some thin steel sheet to the back?
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PM on its way.