Well I ended up ordering an SWM centre stand that came today.
Took a look at the fitting instructions and realised that to fit it the mounting brackets are fitted behind the side stand.
This requires removing the side stand, I got the centre stand as an alternative to paddock stands that I don't have the room to store.
It's ironic that to fit the centre stand you really need a centre stand so you can take the side stand off.
If I'd of known this I would have ordered paddock stands anyway, used them to fit the centre stand and then sent them back.
Or I could just stop whining and bribe on of my mates to come round and sit on the bike to keep it upright while I fit the stand. It would be nice to be warned about this sort of thing when you buy though.