Don't check your air pressure with the valve stem at 6 o'clock. When your not rolling the beads are sitting in the bottom of the tire, which happens to be closest to the 6 o'clock position. With beads, it's better to roll as far away from 6 o'clock before airing up.I've had dynabeads in several sets of tires and check them often... never a problem. I do check the air when the valve is at the 6 o'clock position as recommended.
Yes. You can feed them through the 90 degree stems. It just takes a bit longer. Using an engraver or palm sander to vibrate the stem a bit will significantly speed the flow of beads into the tire. Otherwise, lightly taping on the stem with the handle of a screwdriver works, albeit slowly.can you add the beads through a 90 degrees valve stem or you have to do it when you mount the tire ?