I believe that a riding crop is really the best method for dicipline. I stings but does not bruse like a whip. Never tried beating my subjects with a frame though. How do you hold the frame? Do you break it into sections? Do you use the long side or the short side?? Seriously, I tend to crop before I print. Occsionally I trim after printing but usually I crop first. Besides there is no reason to waster precious paper right. Bsteph