I can’t find them now either, and scanning through my order didn’t help. But “matrix splitter” can turn one matrix output from a GI bayonet into two or three. The comet team is very responsive via e-mail.
Note two other things from my video: 1) cyan is the wrong choice for the blue row in the institute. Use blue. 2) don’t overdo it with the star post lights. If they’re close to the player and directly visible, they’re a bit much. Consider getting a couple of inline dimmers.
Last thing: I learned the hard way that the bolts that attach the star posts and other fixtures to the t-nuts under the playfield tend to bend over time, and so they can break when you unscrew them. Good to have some of these on hand. I didn’t so I improvised something at Home Depot. I’m sure Marco has ‘em.
Can’t wait to see your results!