How to remove woofer speaker safely


Do you have trick to remove, safely,  a 8" woofer, on my Gershman Avantgarde speaker, without damaging the speaker chassis ?  I want to  see the Crossover tweeter parts value and up grade them ?  I would probably have to change the woofer gasket, before replacing the woofer in place, after upgrade ?  It is easy to find gasket woofer ?
audiosens
I use large screw hooks like the ones used for hanging bicycles in a garage. Just insert the threaded screw into one of the screw holes and turn it about 3/4 of a turn or so and gently pull the speaker from the cab.