Don't worry - you're not alone in your insanity. Apparently, I collect motor controllers (up to five now!).
Of course, that motor's way overkill for a Metro, but the shaft will save you some headaches, and I can see why you'd be interested in it. Does it turn freely? Had a chance to look inside yet? (Brushes configuration, commutator condition?)
You could theoretically run an alternator off the tailshaft, and set up a kind of rudimentary regenerative braking (by modifying the voltage regulator).
I'm curious how much it cost... Feel like sharing?
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