As a last resort, there are pullers that you insert into the ball bearing cavity, between the inner and outer races.
This would of course require removal of some of the cage at the appropriate (2 or 3) places which in itself is a bit of a mission.
The puller legs are turned through 90 degrees after insertion, which allows their heads to engage both the inner and outer races in the grooves where the balls run. At this point (I would place the whole assembly into a heated oil bath first) the bearing can then be 'pulled' out via jacking screws working against the outer (or inner) casing.
Suggest you talk to a bearing supplier to learn more, or better still, employ the services of an engineering co. who has this equipment. Doubt many will though.
Good luck!

Thanks Earl,
I like all your shots, each having its own character, but clarity, colours and composition go to #1 for me.

What were the focal lengths?

On my computer, I think that these are the best of any series of bird photographs I have seen.
Very impressed, and certainly a standard to aspire to.
Thank you.

Thank you for that,

I have these covered with the exception of the 24-35 Minolta, and am not a contender for the mirror design 500mm.

I believe there is a market for all of the above on e-bay.

Much appreciated

Glen

I have an 850, and am interested in knowing what lenses you have, and may want to move.

Let me know if you decide to go down this track.

Thanks,

Glen