NEC XM 29 Plus Cap kit?

[Battlesmurf]

So I have this XM 29 Plus- had it for a few months. I got another with a MUCH better picture- and now that I've seen what they're capable of- I really want to fix this one. Basically- the geometry is pretty bad- you can mess with rotation, pincushion, etc etc and never end up with a square picture- the picture curls a bit. Do you folks think I should pop it open and try replacing caps- or does this sound like some other kind of problem?