Thank you so much guys,
I have just checked on it and it seems to be really going for it, the egg is wobbling in the incubator I assume this would mean that s/he has plenty of energy left and not in any immediate danger? I am going to wait another hour and then either go to sleep with an alarm set for 2 hours time and check again or make a hole now.
I have been doing some reading, but just to double check - a small hole in the centre of the air sack/wide end?
I shall go grab an egg from the cupboard to practise on
@Isaac 0 any idea on the second clip regarding that yellow line? (just checked again and no internal pip yet)
Looks normal to me, both eggs you showed look good. You put the safety hole on the tip of the air sac end, if you do it on the side there is a chance the duckling may turn to zip and cuts its air supply off.