See now Im the oppisite I have to have my support thumb on the frame or I will start pushing my groups left. I know trigger control!!!! And I do practice this when shooting groups at the start of practice (live fire) and at the end. And I agree it is a very important part of every practice session. This is one of those tips I got from gh2.
The other thing is you need to do this for each gun you take to practice with.
The other thing is you need to do this for each gun you take to practice with.