rattling Cone heads

How you you attach them firmly? It doesn't seem right to tie the thread in
front and then over the top of them, as it could break easily. OTOH, if I'm
tying something like a conehead WB (or my next effort: a conehead Muddler),
somehow I have to get the body material (WB: dubbing, Muddler: spun elkhair)
up against and inside the concave base of the cone. Don't know how to do
that.

:-(

--riverman