Clare Snyder wrote:

As far as a level being able to measure
totally level both ways on a surface that is
not level - not possible. Even the cheapest
level will only read level on a level
surface, both ways, if it is level to within
a VERY small limit of error - if you can read
the bubble accurately

So what level should one buy for general
purposes? I won't abuse it. Today I made
a fence with planks to three horizontal bars
(ribs?) if you want an example application.

By the way, here I might also ask what way to
put the planks with respect to the age rings?
I thought I'd put them with the imagined circle
away from the bars, so that the plank will
naturally bend that way (toward the bars) over
time. I'm not sure that will happen tho or if
this is something to care about at all?

Third question, the posts down in the ground,
does it really help if you first put them in to
a barrel with a fire?

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