...That was great advice, Vic. Those steps seem to have helped me make some progress. How does it look now?
A little better. You actually applied a bit too much correction--but we may be able to use it.
If you think it through, the secondary mirror tilt adjustment screw (green circle) moved the primary mirror center spot toward the primary mirror (green arrow). If you find the secondary mirror tilt adjustment screw between the two spider vanes at 12 and 3 o'clock (red circle) and turn it the same direction, it should move the center spot closer to the center (red arrow). You should also see the spider vane end attachment at 12 o'clock disappear. You'll know you're very close when the spider vanes all look the same and the bright primary mirror reflection appears "centered" in the secondary mirror. If you rack the focuser out a bit, it should make the bright primary mirror reflection look larger in the secondary mirror, which will make it easier for you to see the alignment improvement.