permaculture

["Elijah Smith" <elijah@hilobay.com>]

When I exhaust the internet and my own imagination, I turn to you guys...

Out here in Hawaii, there are a lot of greenhouses built with metal pipe
framing and plastic covers.  Often, the pipe is bent into graceful curves to
create arches, corners, etc.  I want to make, not buy, a greenhouse but I
can't figure out how to bend the metal.  A few comments:

 I don't want a PVC greenhouse - I want something big I can climb around in.
 I'm aware of "conduit benders" used with electrical conduit... however,
they only give a bend of a certain radius.  I've considered using these
anyway, since a bunch of short bends spaced out over a pipe will give a
long, deep bend, but since that's the only solution I've found, I'm still
thinking it over.
 The one person I've asked, point-blank, "how did you bend that pipe", won't
reveal his secrets, but says that he "uses hydraulics" and can bend any
shape I can draw.

 So, I put it to you free-thinking creative types.  Any good ideas?

 Thanks!
  Elijah