Is it necessary to have both arms shoulder width, back of the hands on the wall and elbow locked all at the same time? I can have the back of my hand on the wall and the elbow fully locked (took a bit to get there with my left arm) with just one hand at a time, or even with both at the same time provided they are closer together than shoulder width, but not otherwise. Is that fine for mastery or should the hands be shoulder width apart with back on wall and elbows locked?
Thanks!