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Jim,
Very good job! I too hope the epoxy keeps everything in place. Looking at the grounding or bonding terminal it looks to have been arcing from spring failure. Did you clean the carbon trails before assembly? Wish I was close to examine with a magnifying glass to see what it reveals. My eyes are not as good as they once were so the help is always welcome. Also with your old wire to be soldered get some soldering flux in a small can. Dip the bare end into the flux & heat until the flux bubbles. This will clean the old oxidized layer off the strands & the bare end will accept & bond to the cable before trying to solder to the fragile coil terminal. I had this same problem using phone cable terminating to small parts like transistors & resistors. Dipping into the flux tin & heat really helped with keeping the heat down on the parts.
Very interesting how the magneto windings are not in the same space. I see no reason why it wouldn’t function, it just looks odd at first glance. Anyone know of other motors with this magneto? 😀