I do a pile of tying on tubes and continual run into this issue. Metal monster cones, metal sonic discs, pro cones, etc - when finishing the fly with these specific types of cones, constantly run into cones loosening or shearing off small scandi tube melted lip. Standard coneheads, soft/plastic cones do not cause this. Looking of opinions on maintaining the cone on the end of the tube. I have tried superglue, goop, head cement, etc. Epoxy is too hard (and even 5 min takes too long to cure - tubes don't fit well on a curing wheel!?). UV cured glues/ resins have same inflexibility problem once cured. Thoughts?