From what I can tell, needle depth adjustment isn’t very far. You either have it tightened down all the way or you have it about half to 3/4 untightened and that’s as much adjustment as you’ll get. And make sure to hold between the battery and the grip or it will just fall apart.
The whole thing is able to he taken apart, I had the same problem cuz I wouldn’t pay attention how I held it when adjusting the depth and was basically screwing the top part off, just watch how you hold it and you should be good, hopefully that helped a bit
