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#3
6th July 2009, 05:24 PM
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hi, this has been discussed before and i think people came to the conclusion that its fine to use 20mm as sometimes metal retailer may advertise some boxsection as 3/4in(but you will actually get 20mm) as i think 20mm is more readily found than 19mm. I for one am using 20mm as well and so have others i think, so there shouldt be a problem.
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my build pics 
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