Stop in for a cup of coffee

I can not find anything about wiring in the tach you have... Im almost thinking its not possible.

Im not sure of the quality of tach you have, but if you need a tach. I have the one below I can send you. Im not using it anymore.
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Hey, that's real kind of you! I'm determined to get this working, though. :) This is my field of expertise so I think I'll be able to pull it off. I just need to make some sort of interface adapter. No biggie once I know how both the magneto and the tach work.