I'm simply adding a tee in my loop, that will be plugged from under the case.
So to bleed it, I'd prop up the case, unscrew the top and bottom caps, and voila! A liquid mess all over the kitchen table!
Thanks for the link, Nuclear! I was using a tiny electric (permanent magnet) electric motor, running off of 2 "C" cells: it's just a scale model, not a racer.