Jim,<br> Consider using a "Timing Belt" it will
offer the positive drive of a chain with the quite
operation of a belt. These are used in industry all the
time and offer long life with no maintence and they
don't slip. I have used hundreds of them to drive
printing presses. Look in your phone book under "power
transmission equiptment" or look for a "Browning" distributer
under bearing houses and they will help you out. They
are not as cheap as "V" belts but they will give you
the best of both worlds.