Originally Posted by panman
Is it glued in with a small drop of epoxy then or does the tensional stiffness of the wire hold it in place.... I've read a number of your articles...
Thanks for your very nice comment.

Glue is neither necessary nor wanted. If you glued it in place you likely would damage the coil and/or slip ring when later trying to remove the slip ring. The coil itself is quite stiff so the hole in the slip ring is more than sufficient to keep the wire from going anywhere.