alexy wrote:

Let me add another for you to think about: DON'T assume that your
walls are straight.

A buddy bought an old house and was redoing one of the walls (forget
exactly what he was doing; plaster to sheetrock, maybe?). The ceiling
was several inches lower on one end of the wall than where he started.

My house is in pretty good shape, as far as bowing and so forth.
Existing freestanding units seem to indicate fairly flat walls (but I'll
check 'em anyway).

-j