Try going to a hobby or craft store and getting some
pieces of 1/8" or 1/16" birch plywood.
--- Jim Franklin <firstname.lastname@example.org> wrote:
> Here's one for a quiet Saturday. I'm installing a
> couple of walls'
> worth of Ikea bookcases. They will sit on an 80 year
> old hardwood
> floor which is no longer close to level. I need
> something that will
> "disappear" under the doubled up 1x supports of the
> Softwood shims are too soft and are wider than what
> they need to
> support. Any idea what would work here? Thin
> hardwood shims would be
> ideal but I've never seen them.