disassemble minolta 80-200 - OK so far, now ?

[marcusBMG]

I have been disassembling a minolta MD 75-200mm zoom to clean fungus.

The front elements were no problem. One ring to undo with a lens spanner, two elements separated by a spacer ring.
The rear elements are enclosed in a tube this whole tube unscrews with the lens spanner and the four elements can then be got at. The last one is glued in the end of the tube so I used a sensor swab to reach down in there.

But now! There is still fungus onthe middle group around the iris. To get at this I think I need to try to separate the barrel. Can anyone from prior experience suggest how to proceed?
PIC 1 shows bayonet end with tube mounted group removed

PIC 2 front end w objectives removed.

PIC 3 this is the lens

PIC 4 and this is the fungus!!!


(pics not showing???)
(tried uploading pic 1 to my website and altering the bbcode to that url - still not showing!!!)
(can a ?moderator check ?no pics - post previews fine)

Cheers

[Lloydy]