You probably already know this, but ensure you check you have two diodes installed where the schematic calls for on the specific memory coils & also on 3 of the 4 drop reset target coils & check the wiring to the respective diodes is configured accordingly as the extra blocking diodes are needed for the solenoid expander to function correctly, without the additional diode it may work but will get some weird behaviour.
Here is pics of my Fathom inlines from a few years ago I had handy.
First two pics - Green Inlines
Last pic - Blue inlines
Something else I wonder. Bally used the 29-1500 memory coils for Fathom & used 31-2000 coils for Centaur. Their must be a reason for the difference even though they have essentially have the same function.
I wonder if it is because the memory coil plungers are different lengths between Fathom & Centaur or for some other reason? earlier games like Xenon also used the 31-2000 memory coils as well as later games.
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