[Ron Ramirez]

You will have to recenter the voice coil with shims cut from a business card once you reinstall the cone. As for the pole piece itself, that part should be self-centering when you reinstall it.

Remember, for disassembly, remove cone with voice coil first, then remove the pole piece, then remove field coil. To reassemble, set field coil in place, install pole piece, then install cone/voice coil. You probably know this already, but some of our friends reading may not know.