4th axis rotary table - suggestions?

Hello,

For my BP cnc conversion, I was planning to fit a 4th servo to a standard
(but good quality) rotary table. It has been pointed out to me that the
backlash on a manual rotary table in going to do me in, and that I should
consider using a rotary table specifically designed for CNC work. I was
refered to the Servo-Systems table:

http://www.servosystems.com/linear_stages_rotary_tables.htm

It doesn't look very substantial to me. It has aluminum construction and
the only work holding is a series of heli-coil reinforced 1/4-20 tapped
holes on the face. The table has a straight 3/4 bore through the center,
and the only hold down is counter-bored quarter inch holes in the corners.
There is no provision for vertical mounting, "put it on an angle plate" was
the Servo rep's suggestion.

Now much of my 4th axis work will be small gear cutting. Loads shouldn't
be a problem, but I've always thought that massive iron construction was
the key to accurate and chatter free cuts. How have other people dealt
with the 4th axis problem?

David M. Munro