Game changer. Brought a bike wheel balancing jig on ebay, cheap Chinese garbage but hey, it worked. Now 20g stuck on (in the right place) and its wonderful, like silk brushing over velvet in the breeze.
Here's a recent thread with more discussion by our pals
If you do this yourself, balance the hub on its own first. Be sure to fit all 5 wheel nuts.
My jig. I'm going to be balancing everything myself from now on.