How do I shot crack in headstock?

If you can spread the crack, a tooth pick is good for getting your glue down in the separation.

Tooth picks can also be used as filler. They are good to use when say a strap button comes out. You can put in a couple of picks, break them off after putting in some glue then they are soft enough to drive with a drill the screw back in to setup a strap button.

Just got it back, paid a real guy to do it. He also did a set up- I wouldn’t let him change the strings though, trying to give Phil Chen a run for his money. He did lower the action though, now I think I have to lighten my touch so as not to generate so much finger noise.