http://www.metmuseum.org/special/se_...673F8362B0F%7D

i'd like to know how he gets those tapered sections of pipe. looks to me
there's lots of sections that aren't cylindrical but truncated cones. seems
like it would be a whole lot of work to slot each one of those cylinders and
reweld them to be truncated cones. oh, but they're not only cones but cones
formed into *compound curves*. i'd really like to know how he does that.
and damn big diameters too. sheesh.