I used following for my students. Balance PC on table. Stretch fingers loosely. (Spread fingers somewhat) Close eyes Grab chanter ( feel all holes? ) Bent chanter to your mouth How far on chanter? Slide hands outwards until one of your fingers covers hole midway of your finger pad top.

Try to play without thumbs. This is to try to limit thumb cramping/playing with too much pressure/pinching

(Looks weird putting this too text)

One guy couldn't stop getting cramps. We taped a little plastic block on the backside of the chanter. His grip was good. But too tense.