Having read of others satisfaction with Dyna beads I decided to also try them.
New Shinko Journey fitted to my front wheel and I use a 90 degree valve stem.
I propped the wheel up on 2 rolls of duct tape.
I followed the instructions and let some of the beads drop from the dispenser bottle, down the supplied tube and into the core less valve stem.
Immediately the beads plugged up the valve stem.

Not matter how hard i tapped the valve stem with a screwdriver nor the frequency of the taps the valve stem remained blocked with beads.
Removing the tube I cleared the valve stem and much more slowly started to allow the beads down the tube.
Allowing a very slow trickle of beads they passed through the valve stem and into the tire. Hurrah!
Riding about 500 miles over the weekend at various speeds and on a variety of road surfaces I'm pleased to say that all felt well.
No weights on the tire and red dot aligned with the valve stem and now to see if the mileage will improve, deteriorate or stay the same.