I was going to try those magnets I got today, but I decided against it. As I approached the yoke with the magnet I could feel the magnet and my hand get a little tingle and that freaked me out a bit (is that normal?) so I backed off before I ever put one on the yoke itself. As I approached with the magnet the only change I saw was the red on the test pattern turned orange, but as I didn't actually put the magnet on the yoke this might mean nothing. Still, I'm kind of afraid to try it now. Anyone else have experience with this?
I did change the vertical size to somewhat match the overscan on the horizontal. It's still uneven though, but at this point I don't think there's much I can do. BTW here are all the adjustments in the 'pincushion menu' (which is funny because pincushion isn't actually one of the options):
H Position
V Size
V S Correction
V Lin Correction
E/W Trapezium
V AGC
V Position
V Centering
V Centering DAC SW
V-BLK Start Phase
V-BLK Stop Phase
Most of these I can figure out what they do, but some like the V AGC, E/W Trapezium, and V Centering DAC SW I have no clue on. Still, none of these seem to address my geometry issues anyway.