Both isosceles and Weaver, plus kneeling, barricade, shooting on the move, retention position, uses of different cover and concealment, weapon retention from a gun grab, and such. Elbows straight but not locked on isosceles, but bent on Weaver.
Rob is the trained trainer so I'd listen to him. Anyway, when I was trained we were still using cap and ball pistols. Carry multiple guns...the original New York reload.
Who's Rob? lol.