I need an Alien expert!
I have a machine and it seems to work perfectly...except for the coils.
When no coil has fired, the next coil fired is strong as it should be...but if you fire another coil immediately, it's very weak and if you keep trying to fire one (like a flipper) they become weaker and weaker.
If you wait a few seconds, the first coil to fire is strong again.
I've replaced all 4 USB cables with double shielded and ferrite.
I have also done the capacitor mod.