Balancing?

[seadog]

+1 as stated, I also use a small engraver against the valve stem to help vibrate the beads in slowly.

The secret to putting the beads in is don't let the air escape by pulling the valve out all the way. Let the air slowly discharge and all that moisture created by the fast escaping air is eliminated. When it finally bleeds down to empty the valve stem is dry and the beads will flow like water pouring them in. It the moisture created by the fast escaping air that hinders the beads flowing in. You still have to pour slowly but moisture won't be a problem added to the installation.

[gregj]

I've used the Dyna Beads since '04, and never had an issue. Go with the beads.