I have been planning on making a recumbent for a while now. I do realize that it's not quite as incredible as most of what is made on here, but I have been hit with a stumbling point. Without hacking a BB off of another bike, how does one acquire or make one? Do they make massive taps or what? I have been browsing across the frame builders section, but haven't really turned up anything concrete, so any assistance would be much appreciated.
A separate question that I thought I might throw your guy's way because of some users rather deep understanding of metal working and welding is; would there anything wrong with MIG welding a frame? Most home builders of recumbents tend to use this form of metal joining with satisfactory results, I was just curious if there was a reason that it is generally avoided in lieu of brazing and TIG? (Other than asthetics, that's not my concern, more like penetration, strength, etc.)
I only have a MIG welder so it will most likely be the route I take, I would just like to know some of the limitation of welding in this fashion.
Thanks for your time!
*edit* I plan on making it out of steel, just an fyi.