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You can tweak the width and HV by changing the value of the retrace capacitor. The cap is across the horiz output and is a low value high voltage plastic or dipped cap.
If you lower the value, the HV goes up but the width comes in. Raise the value and the HV drops and the width will stretch.
If the picture is off center, you may be able to add some DC voltage to the horiz winding. Sony used to do that to offset the horiz on projection TVs. I don't recall how they did that but any Sony PTV schematic from the 1990s will show that.
John
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