I read an interesting instructable about a metal bender and then I saw the most interesting photo of a theatrical workshop tool. I formulated an idea and it quickly turned into a new tool.
Sheetmetal Brake by kess -- SheetMetal Brake Free full set Plans and materials…
Metal Bender - Homemade metal bender fabricated from bar stock and bolts…
Home made tools! - Page 30
Homemade metal bender constructed from flat steel bar stock and steel rods.
Miller - Welding Projects - Idea Gallery - tube bender
Metal bending for iron projects!!
Homemade compact radial bender fabricated from steel. Capable of bending 1" flat stock of up to 1/4" thickness. Accommodates nine mandrels allowing for a range of achievable bend radii from 1/4" to 1".
Metal bender - search Instructables
Metal bender More