Grant's approach is good - I've also had good luck making feet by cutting
the tread part of an old tire = you can glue or bolt it to the base and it
will enhance friction
"Grant Erwin" wrote in message
...
wrote:

They are balanced but the cast iron bases on a concrete floor just
don't provide enough coefficient of friction to make them stay put.

snip------

Interpose a sheet of rubber (cut up truck innertube?) between the pedestal
and floor?

GWE