Exactly what I was thinking. It does seem like you have just been retracing someone else's diagnostic efforts thus far.Given the loose bolts you found getting this far in, has someone recently found a deal breaker further in and just thrown it back together to get shot of it?
Thanks, got that in the manual, the issue is what the pin (3) goes into. I put in in the teeth gap as used by the crank sensor. Apparently not where it is supposed to go. No marks on the chain either annoyingly.