Well took it apart and back together again...with only 2 hands - ha!!! Ta-daaaaa!!!

Well it seems that the brushes might be a bit worn down - im guessing. They show signs of wear, but still appear to be making contact, I took a dremel polishing wheel and cleaned up all contacts and the can that rotates within the magnets.

So i tried it with the 46, turned it over no problem. The 91,,,had to bump start it to get it to turn. So we have an improvement, but still not up to par.

What kind of brushes am i looking for at the Hardware store? ( thanks Grey!)