Well it's a good clarification, for the next guy who opens up their windlass, so bravo to you both for the overall discussion -- without which I'd be a lot more fearful of tackling something like this.
Now I just have to pursue Thinny's suggestion and see if the motor has a model number on it anywhere. Judging by the $76 that I paid for 6 "O" rings (I kid you not), there's got to be a cheaper source for brushes. ...and I have a few days before the $30 spring arrives.
Great minds discuss ideas;
Average minds discuss events;
Small minds discuss people.
The best minds discuss sailing.