I tried to wiggle it and there was no movement I could measure using my ruler, when using a pipe wrench to try and wiggle it I could hear a slight sound that might indicate some movement,aswell as feeling something that might be movement too. Turned the flywheel around a few times, still the same thing, occasional feeling that there might be movement, but too small to see/measure. It is definately leaking from the seal though. I used an impact wrench to tighten the flywheel nut, so I think it is tight enough.
Edit: I'd like to add, I tried changing the spark plug, just to be safe, no difference.