I created this mod to light the AOTD figured. It was too distracting to have them lit all of the time. I used a picaxe microcontroller and a couple of switches for this mod. When the ball enters the towers, the switch triggers the fading light sequence (easy to code on a picaxe). When the ball exits the POTD, the light sequence is turned off. The light sequence really highlights the POTD, but only when the ball is in it rather than all of the time.
Here's a crarrpy vid of the sequence:

I was cleaning/waxing the pf while I had the glass off and I wear gloves when I do that.

I saw this one at PR, and I just implemented it myself in a different way and for a heck of a lot less $$$. I did the same thing with the Balrog whip. That only cost me about $7 in parts. If I can DIY I will, otherwise I will just buy the mod (e.g. mini Tron cab) PR comes up with some very good mods.

I don't have any documented instructions. If you are not familiar with programming a microcontroller, I woudl suggest trying the circuit done by Pinball Refinery. There are some pics of the circuit online and it is very easy to replicate.
I am adding another input to my board to allow dynamic speed control of the fading sequence.

I had some people over this past weekend and the circuit performed very well. Dropped out towards the end of the night but only because the connector slid off the microswitch. I tightened the connector so that it wont happen again.

It's a great effect when the ball falls in the tower and the entire pf goes dark and the POTF characters start pulsing. I really highlights that part of the pf, and only when it needs to.

LOTR is a great pin