Ah finally someone who like the 590. A Rolls Royce even although I never did like the EK.
Pity you are in Adelaide. If you were closer I would happily give you a complete 590 that is cluttering up my shed.

Have you ever had any drive gear problems?
Mine did work fine 20 yrs ago when I last used it but they are renowned for failing.

Enjoy your 590. They are quite a good mower to use but my lawn is only good for rotaries they days.

Jeff