Not a bonded yoke.
You can use the magnets from a refrigerator door gasket. Also
when you junk a set save some. Move & turn the magnet while
watching then glue or tape down. Try about a half inch piece to
start. This all assumes the purity is set right. Moving the yoke
back & forth along with neck magnet setting sets it.
BTW if you mess with the neck magnets mark them FIRST !
73 Zeno
LFOD !