a couple of questions... i figured i would ask them here since they don't really warrant their own thread.

do i need a jig? i want to make more than a few bike frames, and possibly sell one or two at some point (after a ton of practice obviously). i want to make bike frames out of not only lugged steel, but aluminum as well. i also want to use oversized and aero-shaped tubing (after a ton of practice, obviously). will i need a jig to be able to weld aluminum frames, and will i need a special / weird jig for the oversized/shaped tubing?

if i do need a jig, what should my jig be?

i really want to build a frame out of aero aluminum tubing. this is obviously not how i'm going to start with building frames, i am learning TIG welding first and will practice mitering 1,000,000 aluminum and steel joints before i try a frame. but what's needed to build bikes with weird tube profiles, out of aluminum no less?