Quoted from oilspot:
The relay armature plate feels slightly magnetic when hand cycling the relay with power off. Addin 40 Ohm resistance to arch switch was ineffective. I'm going to try adding fish paper or cardboard between the coil core and armature and see if that buys me the additional nanosecond it needs. .and the hold switch is adjusted so it barely contacts, the playfield gate switch is adjusted so the slightest touch opens it.
I use a piece of clear packing tape to do that, works quite well too.