Head shaving ATG

What's your grip for head shaving with a straight ATG?

Can't help you there, sorry! I would never use a straight for shaving my head. The risk of a serious slice is just all too real. Congrats to those that do though!

Standard grip and open scale grip flipping edge depending on right hand right side or right hand left side.

Same here.

Been working on it, open scale grip but my index finger rests on the spine. Seems to be working.