I just got a KP-46WT510 for free that has a red convergence issue where
the corners of the screen cannot be converged properly
in red. (the upper left and lower right are worst, and only red is
effected)
In the center, say 60% of the picture, the red targets can be moved in both directions, and centered.
The
red targets in the far corners are almost a full width away (below) from the
G/B ones, and do not respond to movement, in either direction.