On my 1920x1080 settings now are... shadow_mask_x_count 256 # was 320 shadow_mask_y_count 224
Fixes the scan lines issue.
But I can't get this to look right with the psu on mess. So I left it on the 1280x1024 screen. Perfect on this screen anyway. Maybe since there no bars showing on the 1920x1080 that probably why it not showing right. Bars are there on the 1280x1024 screen.