Yeah, tried both methods mentiond and went and bought a 12mm allen key socket. Got the job done, man, who thought 30kg's could be so heavy and awkward to lift at the same time?
Would have been hilarious to watch me....... back end in first, lift front, fouls! Right, frond end in first, lift back, hmmmmm fouls around the kickstart. Took some swearing to get it back in place! I really need to buy a trolly jack! But all good now and running sweet again. Though I have a seriously broken engine to rebuild, will post pics tonight of the piston to gain some feedback on what went wrong.