Clamped it in the vice and popped it apart, for me the most scary part of the exercise, once its separated out each part can be rubbed down and the old adhesive removed.

The magnet and its mating face on the frame cleaned up first prior to allying epoxy, need to be careful to put the magnet back in the same polarity.

This doesn't need to be dead centre on the frame, but the closer it is the better.....

The rear plate and core need to be cleaned up too, old adhesive removed....

And then they need epoxying together.....they need to be placed on a completely flat surface or the core floats around!

Ooooh... glad someone knowledgeable is doing this :-D

thanks for updates craig

And for quick progress!

Dust cap lifted off with the assistance of the girlfriends hairdryer...….

When the epoxy has cured the base plate is held in a vice and the frame, magnet and coil are carefully lowered onto the upright core. then the "alignment jig" is fitted, a saucepan is useful to rest everything on

Adjusting the screws around the lower half of the jig secures it to the magnet, then looking through the dustcap one can adjust the upper row of screws to centre the core in the coil.....