The engine has just gone over 2000 hours but compression's are all mid to upper 70's and oil usage around 8-10 quarts an hour, so nothing too concerning there.
Before the laying up for a couple of months I thought I'd take precautions by changing the oil and adding Camguard. Should have listened to all the advice about flying regularly and not less than 1 hour at a time!
You can see the result but I still thinking about what did we do before cheap, readily available and good quality bore-scopes and the implications of blindly assuming risks have been mitigated.
So this is the inlet valve on Cylinder # 1. Obviously the cylinder will be pulled before the engine is run again and I'm hoping the bottom end hasn't suffered too much. Interestingly enough the other cylinders seemed ok and this one was 78/80 on the last annual about 6 months ago.
Lesson learnt for the future.