Right. Installed a new Node Board. If you have to do this, watch out!
1. The standoffs on the new board were shorter than the original ones. As you can see in the photos, the new standoffs would have caused the screws to gouge through the other side of the playfield. I would have been a sad panda.
2. The new Node Boards are a slightly different size to the original ones (see photo), so you'll end up making new holes. Very, very carefully.
I'm just glad I checked. The new board did not come with smaller screws.
I hope this helps someone in the future avoid something awful. On the plus side, I switched it on, it updated the node board, and it seems to be running ok. I'm letting the whole game fully discharge all caps before carefully screwing the other screws in.
Phew!20200415_131532 (resized).jpg20200415_132317 (resized).jpg20200415_131705 (resized).jpg20200415_131804 (resized).jpg20200415_131824 (resized).jpg20200415_132952 (resized).jpg