I haven't decided yet between brass and aluminium, but I do know that I need to bend some 1/2" x 1/8" metal to form the front standard of my camera (it will be 'U' shaped, ideally with 90 degree corners). What kind of brass or aluminium should I shop for, and what's the best way to bend it? Keep in mind that I also need to cut slots in the sides, so machinability is also a consideration.

Thanks,

Curtis