Actually a relay is about $20 and a diode might be 10 or $12.
Wiring it up is easy.
And somewhere in there is the answer to my question I was just hoping somebody with electrical knowledge would connect the dots.
My recollection when I joined this Forum 16 years ago was it there was a great deal of discussion about ways to improve on a manufactured product, cams, headers, axle swaps, I could barely keep up.
I think the culture here has been influenced by social media.
But when I do work this out I'll let you know how it went
