Well I have had my #CFTBL for the last 9 years and it never came with a holo so I modded it many years ago to complete the feature and tried a universal monsters translucent green Universal Monsters figurine hanging with fishing line that I backlit in green. It looked cool and did the job for the brief light up moments over the years.
then about 8 years ago Joe from Laseriffic created a etched acrylic panel which you could edge light and it looked great but sadly never evolved which I heard was stopped due our friend Rick from PPS.
then about 1 year ago I believe a non pinhead did a similar laser etched acrylic panel for a pinball friend ???, anyway the result was an affordable acrylic panel which I purchased one of the early made ones and stashed away until I was going to do a full restore. But decided to do a basic shop out as selling the game soon but wanted to test it out as always liked Joe's concept / approach.