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Pat Said:
I came up with the idea of mounting an ignition capacitor across the relay. It's cheap, has great mounting lugs and terminals and does an adequate job of snubbing the back EMF from the coil.
I think this is a good idea. It is not ideal, but maybe ideal is impractical and unobtainable. Some may say that this will cause the ignition switch to burn out faster. It probably won't burn out that much faster. The wires are long and the capacitance is small. Sometimes a good mechanically sound solution like this is better than the ideal electrically correct solution. Especially if the electrically correct solution can not be made mechanically sound very easily. Ignition switches have big contacts. I tried to find some diodes that terminate with braided wire and ring terminals like an ignition capacitor and had no luck. If anyone else finds this, please let us know.

Regards,
Ed
Watsonville CA.