No star light cutouts are needed, IMHO. They shine through just fine. I am going to order all of them without cutouts and without screw holes. I'll mark the screw holes on the back if anyone wants to drill them (or I'll drill them for you) but I don't think they are needed. The way it is cut and fits, pressure holds it in just fine. The PCB moves around a bit so either I'll screw that in with the original screws behind the plastic, actually drill the plastic holes or use some double sided tape for it as well. It barely needs anything to hold it in place.
Fair warning, the price is likely to go up. Waiting to hear back from CPR on final cost but I probably priced it too low (assuming lots of game modifications needed, that I'd do all the work on my end to make the plastics, etc). So if you already ordered, you got the early bird discount and until I change it anyone else who orders will get it too.
Anyone who ordered the routed backboard is going to get a refund. It's not needed.
No other modifications are made to the game at all
Here is the plastic without the hole cutouts for the star lights, definitely not needed:
Here is a quick demo of the arduous process of installation. Steps not shown, for LE/CE, unscrew the starmap plastic