Tube Swap Question/Crosshatch

Fudd

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Trying to adjust my monitor after a tube swap. With the crosshatch on i can align rgb in the center of the screen no problem but on the left edge the red is way off and on the right edge the blue is way off. Do i need to get some magnetic strips to help pull those edges in?
 
The magnetic rings on the neck adjust color convergence in the center of the tube.

The positioning/tilting of the yoke with rubber wedges adjust the color convergence at edges of the tube. Fine adjustment is done with tiny 3/8" squares of sheet metal wrapped in glass cloth tape for insulation. These are slipped between the yoke and tube.
 
I just dialed the yoke in a little more but it was still off. I found some old magnetic strips on a dead g07 i have and used them for the swap. It's definitely better but i need a couple more strips. Is there somebody who sells these or is it as easy as cutting up a fridge magnet and gluing them in place?
 
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