Some of the beads won't make the bend, while others in the same batch will negotiate the curve. There's some minor product inconsistency, and a little bit of trial and error.
On smaller hooks, I just lay down a little thread before I slide the beads on. I build up a small bump of thread at the hook eye to stop the beads and allow a little space before the epoxy goes on. The thread gets covered by the epoxy, so there shouldn't be any issue of unraveling on these things.
I have some glass beads I've purchased from fly shops, and some from craft stores. Each of the flies shown has five beads on it.
Ard's flies are size 4 and size 6 saltwater hooks. The barbs are crimped, or the beads would not have made it on there.