Try playing to 20 without 1 pt card stepper making contact.
I already effectively did that when I opened the switch on the A player relay
Anything from 2 - 7 will bust, these are all linked via GREY with Black
Yes .
21 gives option of replay through outhole relay.
Yes
If 1 pt stepper is on anything other than 1 or zero when 20pt relay pulls in - you will bust
Yes .. will check it 1pt card reel again and let you know