This chick self hatched but thats about as much as I'll help a chick hatch before leaving them to it, if they cant hatch successfully they probably wouldnt survive post hatch whithout help either.
I do chickens not quail but generally I'd get their head and upper body free and leave them to it! If they arent fighting to hatch they could still be absorbing their yolk and to remove the shell can cause rupture and death
