Doc,
The Illustrious comes standard with a VTA collar. It is a knurled, threaded, top hat shaped piece. You install it on the the arm pillar with the flat, knurled part on top. You then insert the arm pillar through the armboard and place the washer and nut in place. Raising and lowering of the arm for VTA adjustment is done by rotating the knurled portion and locking it in place with the bottom nut. Most folks don't use the serrated washer though. I hope this helps.
The Illustrious comes standard with a VTA collar. It is a knurled, threaded, top hat shaped piece. You install it on the the arm pillar with the flat, knurled part on top. You then insert the arm pillar through the armboard and place the washer and nut in place. Raising and lowering of the arm for VTA adjustment is done by rotating the knurled portion and locking it in place with the bottom nut. Most folks don't use the serrated washer though. I hope this helps.