[old_tv_nut]

I want to correct what I wrote about the horizontal and vertical dynamic interaction. The picture you posted shows only a horizontal dynamic problem on the right side. What has happened is that both the red and green correction are either too strong or too weak there (probably too strong?).

One color has moved up to the left and the other up to the right (or down to the left and down to the right) so that the vertical displacements are equal (hence good horizontal lines). but because of the 120 degree offset, the horizontal displacements are opposite when the vertical offsets are the same. So the green is pushed toward the center while the red is pushed toward the right edge.

Sorry, I failed my engineer's spatial understanding test on this one!