Thought it'd be a good idea to remove the freehub to see if there was any way to take up the wear and/or grease the innards.
First problem is that 10 mm hex key is too small so off I go to purchase 12 mm. Too big to fit into hub so I buy a 7/16 in (11.1mm) hex key that fits but is too small. ..... figure out that the hub needs 12 mm but it is the hole in the bearing race that it too small. A quick head scratch to conclude it would be ok to open up the hole - done with a dremel grinding attachment - whcih it was. 12 mm hex key fits, so far so good.
Now the freehub is damn tight - yes, I was trying to undo it correctly (it has RH trhead) so out comes a 2 ft length of steel gas pipe. Heave onto the pipe and crack - hub comes undone - great.
Clean races and pack hubs with grease and ball bearings then notice there is a crack in the hub .... hmmm, was it there before? Not sure but reckon I would have noticed it so most likely I snapped the hub trying to remove the freehub .... which after packing with grease, plus there being no way to take it apart, is still as floppy.
Never mind ....
(don't suppose anybody has got a rear disc hub with 28 holes?