Need assistance with vertical troubles on my silvertone

[jpdylon]

This one I got about a year ago:
http://www.audiokarma.org/forums/sho...d.php?t=154960


I finally got around to recapping the chassis and bringing it up. Everything actually looks pretty good except for the vertical problem at the top.

Its not a foldover, but rather a compression at the top. The linearity control changes the bottom of the picture from acceptable to huge. The height control has little to no effect.

I'll be pulling the chassis again this weekend. It appears to be a CTC-15 chassis, not a 12 like I had thought. Any pointers before I dive too deeply in it?