Saw a project a few years ago in an American WW mag about making a dust
extraction system using a proprietary switch unit which switched on the
extractor when the dust making tool was turned on- like the better portable
extractor units. Where can I get one of these switch units- the article had
a supplier and ref no but of course cannot find the article or any trace of
a supplier on the www. Any ideas? (am in the UK but expect can get if it is
a US unit)