David Taylor wrote:

Some "enhancements"/clarifications to David's suggestion:


With the table in the position in which you intend to use it, place
packing such as pieces of cardbroad under the wobby legs until they
don't rock.

When I have done this, I've set the chair on my table saw versus the
ground. This is as flat a surface as I have. Also, the block of wood
slides more smoothly and it eliminates inaccuracy introduced by the
floor. You may want to check your chair with a level.


Then use a small block of wood, say 1/2" high, held against the sides of
each leg as guide as you scribe a line around all four sides of each of
the legs in turn, then cut the legs to the marks and it won't wobble.

Specifically, tape a sharp pencil or pen to a block of wood with the tip
protruding beyond the edge. Then place the block on the tablesaw surface
and scribe around all 4 legs and cut/file to the scribed lines.


Same for chairs.

Hope that helps!

David.