Re: Have a question about two-handed backhand?
Yes it should always be your non-dominant hand. Tie that in with as described above a relaxed shot, let natural acceleration and deceleration occur on your swing, or you won't get the racquet head speed needed to get bite on the ball. Also two-handers often cramp themselves without giving themselves enough room to hit the stroke out to the side. Keep that in mind, and you should be able to produce more power.