Little follow up on the weld cart build where I did a lot of bending but didn't pay it much mind.
Sheet metal, specifically, but this goes for all bending in general (sheet, tube, pipe, bar, spoons etc etc etc)
Also, you should watch Stefan G do his thing: www.youtube.com/user/syyl
For the people asking, the ruler is called a "stop rule". Check this link out from Lee Valley (no relation): http://www.leevalley.com/us/wood/page.aspx?cat=1,43513&p=61607
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