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Originally Posted by Russ Noble  Or offset mount the ball. |
What a great project for one of you engineering types with big machines and lots of time on your hands!
You could fab up an upright with a bolt-on top plate that locates the upper ball joint. Make several top plates up with different UBJ distances so you have an instant variety of KPI angles at your disposal.
Then test, test, test to get a feel for how close light-steering theories come to practice. You might have to crank out a range of rim offsets on your metal spinning lathe as well ...