How to remove B&W 800 N midrange??


I am pretty sure the driver is blown and would like to remove it to test/replace. It looks like the midrange driver is held in by a threaded rod that goes through to the rear of the enclosure. Does anyone know for sure? I am the second owner, so there is no warrantee to be concerned with. Thanks.
baffled
Arcoleo and semi.....congratulations, you know more about this than my local B&W dealer. He is looking into borrowing the 700.00 tool from B&W. What a pain! Thanks to all for your help.
Beheme,i was thinking the same thing,i would love to see a pic of this grovy device so i could replicate it & sell it for a 1,000 % discount,talk about banging the customer out at every turn.
I have a poping sound once in a while from 1 bass cabinet. not sure which driver so i ordered both to be safe. has anyone ever replaced one of these.

thanks