On Sat, 11 Jun 2005 18:34:26 -0700, Steve wrote:

There are pneumatic angle drills used in the aviation industry that will
work in very tight spots.

I have one of these things that looks like a spider crab - there are
three two-foot-long "arms" to it, with any-angle gearboxes between each
one.

Unfortunately one gearbox is beyond hope, but then I bought it as raw
materials for a steampunk lighting project, not a tool.