Quoted from mavantix:Then and ES3D chip at D28 was also apparently reversed so it’s cathode goes the other way?
The reversed diode D28 is not a hack, it is almost certainly a placement mistake!
In my I/O board documentation (https://pinside.com/pinball/forum/topic/heighway-pinball-support-full-throttle-and-alien/page/18#post-4810082) you can see those diodes: They protect the FETs against back currents from the coils they switch on and off. If you reverse the diode, the +70V is more or less shortened to the ground, as soon as the FET is switched on. This will kill the diode and/or the FET if the involved 70V fuse is not fast enough. So you need to turn the diode, but be sure to check/replace the diode and FET if the board was already used.
The 0 Ohm resistors with additional wires are a proven "update".