Thx. I've seen pics of the available tip wheels. And off-the-shelf wheels would work. But the Glasflugel device was so elegant: the wheel was small but robust, and half buried in the tip instead of the entire wheel being encased in a fairing, as I've found commercially available. And already mounted in a fiberglass assembly. I checked Streifeder's site without success but I'll post something on the Libelle owner's forum.

Chip Bearden