Empire 208 turntable

IMO the 208 is the one to mess with because you can put a modern arm on it. We did so much tweaking to it we finally even made a new plinth for it

http://www.atma-sphere.com/products/208.html

If you want a simple effective tweak, get rid of the 45 rpm adapter and get the lip milled down. Then install a modern platter pad on it. Finally, there is a concentric well on the bottom of the platter that can be filled with various damping compounds. You will hear an immediate improvement!

When we made our new plinth the difference was immediately audible. Its machined out of solid aluminum and fits all the old parts except the arm. You can treat the old plinth with damping materials, but the stiffer you can make the coupling from the platter bearing to the base of the arm the better.