Yon Bárcena <<hangglidingdevices>>
sends his version:

Franco Rinaldi <<francorinaldi>>
sends:

Here is a picture of the winglets I made and continue to
manufacture for some different gliders:

The tips from Wills Wing only work with their new gliders. These
are made for retrofitting. Larry Bunner is happily flying with Franco's tips. I
will test out the Wills tips and the on from Yon. The feedback that I am hearing
is that the pilots don't like them for the first two or three days and after
that they do like them.