I have just joined the Forum and thought you might be interested in this video on YouTube which shows the use of a 3D printed Centre Finder to centre the bit on the stock on an Incra Ls Positioner Router Table.

I have asked my son, who has a 3D printer, to make me one and I will let you know how effective it is.

if anyone else has already found the video and has downloaded and printed the jig I would be very interested in their observations.

Router table centre finder - YouTube