Hi PRD,
Thanks for the hints, will dive in and have a look. I did find early on (ie months ago, 10s of mowing hours) that the pedal-to-clutch linkages had been gummed up by grass etc and did clean those and and lube. That did free up the pedal and helped things at the time, but the pedal travel is still free, hence my focus on the clutches.
Nath - Thanks for the heads up witih the nickel anti sieze/grease, will go get some.
Apparently a parts supply has come in locally so I'll get into it and advise, with pics : )
Cheers