Another question, in the manual it says "for
indoor use". What does that mean? The tool
can't take rain? Or cold? Or damp?

I'm planning to lay a tin roof above part of
the area so one can be inside and outside at
the same time. Surely the tools won't break
from use under such a roof?

--
underground experts united
http://user.it.uu.se/~embe8573