Miller metal brake --> http://www.millerwelds.com/interests...bending-brake/
Forum thread on one ---> http://www.jalopyjournal.com/forum/s...ead.php?t=2048
And a couple pics from the above thread on a homemade one, makes sense if you look at it close enough... (this is my fav, and may be the next project on my list :D)
Another sheet metal brake plan --> http://bd-4.org/bendingbrake.html
And another from a forum---> http://www.toolandfab.com/forum/showthread.php?t=599
The previous Link got his idea from these plans ---> http://www.majorleagueduning.com/tech/Brake/Brake.htm
:pickle::banana::pickle:
Hope this helps!