How do people do redundant spark using two feeds to one spark plug?
I am thinking of using computer spark alongside magneto fixed advance as a dual system into one plug.
Most auto conversion failures are ignition related.
Plans are readily available on the net that can be built from .
You would not in my opinion infringe on any copyright because everyone blatantly copied everyone else back then.
I have copies of 3 different versions where the only difference in the wing drawings is the title block.