I am so glad to read this as I have exactly the same thing with my chicks, one looks exactly the same as yours, no gold spot but less chipmunky, I will figure out how to post a pic and show you
We had a power cut just before my geese were due to hatch, only one made it, poor little love all by himself, we put a mirror in his box and he thinks he has a little friend
The only thing I found hard to understand was the timescales, my goose was internally pipping for at least 18 hrs before I intervened and a further 33 hrs before I helped him out of his shell...I trusted my gut feeling but how long I should have left it was a question I couldn't find an answer to
I just wanted to say I did this this morning, opened the top of the shell for a baby goose, it's my first time hatching and one internally pipped but after nearly 2 days there was no external pip so I made a hole as you said, then I ended up removing the top of the shell and lifting out its head...