Immediatly after I replaced mine I also noticed a slight tick. It went away after a day or two. I guess I forgot about it untill right now. My sound was a very very faint woosh woosh woosh that also increased with engine rpm.
Are you sure the rubber on your balancer hasn't been rotted away? Maybe changine the CPS you disturbed the balancer and completly broke the rubber apart.
Is there any way we can get a sound or video clip?