Taking apart an 8700g

[aston]

I'm in the middle of changing the back & front housing of my 8700g and all went fine except I can't get the circular loudspeaker out of the back housing. I don't want to apply too much pressure in case I do some damage. Anyone know how to get it out of the old housing so that I can insert in the new one?

I recall there was a forum member who took a BB apart recently and documented the whole thing in a forum message but I can't locate the thread.

Alternatively does anybody know if taking a BB apart is covered in any manual or other documentation available anywhere?

Thanks!