I stripped out one WW crank arm not realizing there was a washer stuck in there. I got the arm off using an ARES 15036 puller. It has thin hooks to fit behind the crank arm. I think I had it in the two-jaw configuration.Probably also going to order new crankarms.. getting closer to cutting this one arm off. Tried to use a gear puller on it but can't really grab on. I've heard people say to heat up crank arm to get it off, but don't really want to mess with that on ebike.