Amazing Nick. Kingpin is my all time favourite pinball. Hoping it gets remade one day. Watching that video brought back memories of playing one in the states a few years ago.
You're lucky to have played one Tony I doubt I'll get tha the chance unless it does get remade.
I have mapped out the lamp wiring bur there are a few hurdles. Routing for inserts is outside my skill set, although Eltimbo has given me contact for this if I do go down that path. I have started the harness and Daniel has provided me with the lamp holders so it is feasible. One really funky effect is the start of multiball "RAID" when the white GI turns red - you can see when during the start of multiball in the video when the lamps in the backbox go out - sould be great to see.
Did you see that when you played Tony?