Yes, if you are using color LEDs in the GI there are many people who think you are wasting your money.
https://pinside.com/pinball/forum/topic/no-rainbow-puke-club-post-pics-of-worst-color-gi-fails
Centaur is a great looking game with mostly a black and white theme. If you are going LED in the GI only use warm or sunlight white frosted in the GI to not hurt people's eyes or offend the color.
Opinion only but you asked. Simply, do not expect to recoup money you put into your custom changes.