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Old 25. Oct 2018, 01:17 AM   #2 (permalink)
Remah
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Join Date: Jul 2010
Location: New Zealand
Posts: 1,741
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I like this idea but I've never seen anything like it.

So I started by searching this site and, surprisingly, there was such a product but I don't think it has survived beyond 2011:
https://www.techsupportalert.com/con...principles.htm
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