I did do a Cylinder leakage test and it was all good. Just luck of the draw I guess, I'd like to think anyway... I don't thrash the nuts out my cars, had plenty of stis, mr2 tubbys etc. and always been fortunate that nothing catastrophic has ever happened. I think I'll buy a compression tester kit though for future cars. My mechanic is always busy for weeks. Is there anywhere in the South East I could go and get it dropped off and picked up from, that people could recommend if it does turn out to be the piston which seems like it will be? Just a thought at the moment to get it